A mist covers the beaches in St. Ives during the G7 leaders summit, in St Ives, Cornwall, Britain, June 11, 2021. REUTERS/Dylan Martinez

A mist covers the beaches in St. Ives during the G7 leaders summit, in St Ives, Cornwall, Britain, June 11, 2021. REUTERS/Dylan Martinez

A man walks on the beach in front of a mist covered St Michael's Mount, as Cornwall prepares for the G7 Summit, in Penzance, Britain, June 10, 2021. REUTERS/Toby Melville

People walk on the beach in front of a mist covered St Michael's Mount, as Cornwall prepares for the G7 Summit, in Penzance, Britain, June 10, 2021. REUTERS/Toby Melville

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario TPX IMAGES OF THE DAY

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests wait to board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, on the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Skylon Tower in Niagara Falls, Ontario, CA is seen through fog from Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Crew members reach for plugs to recharge the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Crew members reach for plugs to recharge the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Horseshoe Falls is seen from the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

The Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, is plugged in to recharge before the first ride of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Crew members recharge the Maid of the Mist boat, which ferries guests to the base of the American and Horseshoe Falls, before the first ride of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Crew members insert plugs to recharge the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first day of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Crew members prepare the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, for the first ride of its 136th consecutive year of operation, in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests on board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Guests board the Maid of the Mist, which ferries guests to the base of the American and Horseshoe Falls, during the first ride of its 136th consecutive year of operation in Niagara Falls, New York, U.S. April 29, 2021. REUTERS/Lindsay DeDario

Long COVID sufferer Pedro Sanchez-Vicente, a 56-year-old event organiser, poses for a photograph taken through blue plastic, in Madrid, Spain, March 17, 2021. The photograph was taken through blue plastic to visualise the effects of long COVID. Sanchez-Vicente spent 100 days intubated in an ICU unit after getting infected with COVID in March, 2020. But after his release from the hospital he started developing many of the symptoms associated with long COVID. "I'm not your typical long COVID case, because most of those patients haven't been hospitalised or not for too long, unlike me. But I share with them the mental mist, the paresthesia, the hearing problems, conjunctivitis, eye herpes. You could say I'm a hybrid," he said. When Sanchez-Vicente got transferred to a regular ward at the hospital, he spent most of his time in the armchair in his room, he was so weak he could barely stand up and laying down in bed for long periods of time was difficult. "When I returned home I saw the armchair my family had bought for me as a surprise. I have pretty much been living in that armchair for the past year. Even now I find myself sleeping in it for hours every night because I have difficulty breathing in bed." REUTERS/Susana Vera SEARCH "SPAIN LONGCOVID" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Long COVID sufferer Teresa Dominguez, 55, a social worker specialising in disabilities, poses for a photograph taken through blue plastic, in Collado Villalba, Spain, March 4, 2021. The photograph was taken through blue plastic to visualise the effects of long COVID. Dominguez had only missed work when she gave birth to her children. The "mental mist", as she describes her inability to concentrate, and permanent fatigue after performing the simplest of everyday tasks have constrained her life for the past year, since her March 2020 coronavirus infection. "I started writing a diary because when doctors asked me about my symptoms, I couldn't remember many of them. At first doctors didn't know much about long COVID and I felt like I could help them out and others in my situation by providing them with that information. It has often been difficult to make them believe that we are really sick, that we are not making this up," she said. REUTERS/Susana Vera SEARCH "SPAIN LONGCOVID" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.

A diary notebook belonging to long COVID sufferer Teresa Dominguez, 55, a social worker specialising in disabilities, is seen photographed through blue plastic, in Collado Villalba, Spain, March 4, 2021. The photograph was taken through blue plastic to visualise the effects of long COVID. Dominguez had only missed work when she gave birth to her children. The "mental mist", as she describes her inability to concentrate, and permanent fatigue after performing the simplest of everyday tasks have constrained her life for the past year, since her March 2020 coronavirus infection. "I started writing a diary because when doctors asked me about my symptoms, I couldn't remember many of them. At first doctors didn't know much about long COVID and I felt like I could help them out and others in my situation by providing them with that information. It has often been difficult to make them believe that we are really sick, that we are not making this up," she said. REUTERS/Susana Vera SEARCH "SPAIN LONGCOVID" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

The armchair where long COVID sufferer Pedro Sanchez-Vicente, a 56-year-old event organiser, spends most of his time, is seen photographed through blue plastic, in Madrid, Spain, March 17, 2021. The photograph was taken through blue plastic to visualise the effects of long COVID. Sanchez-Vicente spent 100 days intubated in an ICU unit after getting infected with COVID in March, 2020. But after his release from the hospital he started developing many of the symptoms associated with long COVID. "I'm not your typical long COVID case, because most of those patients haven't been hospitalised or not for too long, unlike me. But I share with them the mental mist, the paresthesia, the hearing problems, conjunctivitis, eye herpes. You could say I'm a hybrid," he said. When Sanchez-Vicente got transferred to a regular ward at the hospital, he spent most of his time in the armchair in his room, he was so weak he could barely stand up and laying down in bed for long periods of time was difficult. "When I returned home I saw the armchair my family had bought for me as a surprise. I have pretty much been living in that armchair for the past year. Even now I find myself sleeping in it for hours every night because I have difficulty breathing in bed." REUTERS/Susana Vera SEARCH "SPAIN LONGCOVID" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A combination picture shows long COVID sufferer Pedro Sanchez-Vicente, a 56-year-old event organiser, posing for a photograph taken through blue plastic, and the armchair where Sanchez-Vicente spends most of his time, photographed through blue plastic, in Madrid, Spain, March 17, 2021. The photographs were taken through blue plastic to visualise the effects of long COVID. Sanchez-Vicente spent 100 days intubated in an ICU unit after getting infected with COVID in March, 2020. But after his release from the hospital he started developing many of the symptoms associated with long COVID. "I'm not your typical long COVID case, because most of those patients haven't been hospitalised or not for too long, unlike me. But I share with them the mental mist, the paresthesia, the hearing problems, conjunctivitis, eye herpes. You could say I'm a hybrid," he said. When Sanchez-Vicente got transferred to a regular ward at the hospital, he spent most of his time in the armchair in his room, he was so weak he could barely stand up and laying down in bed for long periods of time was difficult. "When I returned home I saw the armchair my family had bought for me as a surprise. I have pretty much been living in that armchair for the past year. Even now I find myself sleeping in it for hours every night because I have difficulty breathing in bed." REUTERS/Susana Vera SEARCH "SPAIN LONGCOVID" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A combination picture shows long COVID sufferer Teresa Dominguez, 55, a social worker specialising in disabilities, posing for a photograph taken through blue plastic, and her diary notebook photographed through blue plastic, in Collado Villalba, Spain, March 4, 2021. The photographs were taken through blue plastic to visualise the effects of long COVID. Dominguez had only missed work when she gave birth to her children. The "mental mist", as she describes her inability to concentrate, and permanent fatigue after performing the simplest of everyday tasks have constrained her life for the past year, since her March 2020 coronavirus infection. "I started writing a diary because when doctors asked me about my symptoms, I couldn't remember many of them. At first doctors didn't know much about long COVID and I felt like I could help them out and others in my situation by providing them with that information. It has often been difficult to make them believe that we are really sick, that we are not making this up," she said. REUTERS/Susana Vera SEARCH "SPAIN LONGCOVID" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. TPX IMAGES OF THE DAY.

Filipino bat ecologists Phillip Alviola and Kirk Taray set up a mist net near a bat roost at Mount Makiling in Los Banos, Laguna province, Philippines, February 18, 2021. "My goals are to encounter all the bat species in the Philippines and document their echolocation calls and survey the bats in different areas of the country especially in Mindanao," said Taray. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Edison Cosico, an administrative aide at the UPLB Museum of Natural History, sets up a mist net near a bat roost at Mount Makiling in Los Banos, Laguna province, Philippines, February 18, 2021. "I get to teach students and remain a student myself. It's fun. Being in the field even for 24 hours beats being in the office from eight to five," said Cosico. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Kirk Taray, a bat ecologist, detangles a bat caught on a mist net that was set up in front of a building with a bat roost at the University of the Philippines Los Banos (UPLB), in Los Banos, Laguna province, Philippines, February 19, 2021. "With the ongoing pandemic, there is more caution taken into consideration while studying bats. Several measures and protocols are established to protect both the researchers and the bats. Also, the community quarantine and travel restrictions added difficulty especially in accessing potential areas of study," said Taray. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES TPX IMAGES OF DAY

A bat that was caught on a mist net set up by scientists in front of a building with a bat roost, is captured at the University of the Philippines Los Banos (UPLB), in Los Banos, Laguna province, Philippines, February 19, 2021. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Phillip Alviola, a bat ecologist, and Edison Cosico, an administrative aide at the UPLB Museum of Natural History, sit and wait besides a mist net that they set up near a bat roost at Mount Makiling in Los Banos, Laguna province, Philippines, February 18, 2021. "It's really scary these days," said Cosico. "You never know if the bat is already a carrier," he added. "What we're after is finding out if there are any more viruses from bats that can be transmitted to humans. We'll never know if the next one is just like COVID." REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Kirk Taray, a bat ecologist, holds onto a bat that was caught on a mist net as Ryan Llamas, a field assistant, holds up a flashlight during field work at Mount Makiling in Los Banos, Laguna province, Philippines, March 5, 2021. "I am still starting with this career and I am planning to continue doing this as long as I can. A lot about bats is still unknown to science and I have many years ahead of me to contribute and shorten that information gap," said Taray. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Ryan Llamas, a field assistant, detangles a bat that was caught on a mist net at Mount Makiling, Los Banos, Laguna province, Philippines, March 5, 2021. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A mist net that was set up by scientists to capture bats, hangs in a forest at Mount Makiling, Los Banos, Laguna province, Philippines, March 5, 2021. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Ryan Llamas, a field assistant, stands by a mist net that was set up to capture bats, as he waits for bats to be caught at Mount Makiling, Los Banos, Laguna province, Philippines, March 5, 2021. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Phillip Alviola, a bat ecologist, attempts to catch a bat that was caught on a mist net that was set up in front of a building with a bat roost at the University of the Philippines Los Banos (UPLB), in Los Banos, Laguna province, Philippines, February 19, 2021. "What we're trying to look into are other strains of coronavirus that have the potential to jump to humans," said Alviola. "If we know the virus itself and we know where it came from, we know how to isolate that virus geographically." REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Scientists wear personal protective equipment (PPE) to protect themselves from exposure to bats, as they set up a mist net in front of a building with a bat roost at the University of the Philippines Los Banos (UPLB), in Los Banos, Laguna province, Philippines, February 19, 2021. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A scientist wearing personal protective equipment (PPE) to protect against exposure to bats, holds on to a mist net that was set up to capture bats, in front of a building with a bat roost at the University of the Philippines Los Banos (UPLB), in Los Banos, Laguna province, Philippines, February 19, 2021. REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Phillip Alviola, a bat ecologist, catches a bat that was caught in a mist net in front of a building with a bat roost at the University of the Philippines Los Banos (UPLB), in Los Banos, Laguna province, Philippines, February 19, 2021. "What we're trying to look into are other strains of coronavirus that have the potential to jump to humans," said Alviola. "If we know the virus itself and we know where it came from, we know how to isolate that virus geographically." REUTERS/Eloisa Lopez SEARCH "LOPEZ BATS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

A staff of teamLab wearing a swimming suit stands inside a digital artwork combined with light, mist and sound during a demonstration of TikTok teamLab Reconnect, digital artwork combined with sauna, ahead of its opening to the public this month in Tokyo, Japan, March 13, 2021. REUTERS/Kim Kyung-Hoon

A staff of teamLab wearing a swimming suit takes shower next to a digital artwork combined with light, mist and sound during a demonstration of TikTok teamLab Reconnect, digital artwork combined with sauna, ahead of its opening to the public this month in Tokyo, Japan, March 13, 2021. REUTERS/Kim Kyung-Hoon

A staff of teamLab wearing a swimming suit stands inside a digital artwork combined with light, mist and sound during a demonstration of TikTok teamLab Reconnect, digital artwork combined with sauna, ahead of its opening to the public this month in Tokyo, Japan, March 13, 2021. REUTERS/Kim Kyung-Hoon

Mist sits in the river at Tummel valley near East Haugh, Scotland, Britain January 7, 2021. REUTERS/Russell Cheyne

Mist sits in the river at Tummel valley near East Haugh, Scotland, Britain January 7, 2021. REUTERS/Russell Cheyne

Mist sits in the river at Tummel valley near East Haugh, Scotland, Britain January 7, 2021. REUTERS/Russell Cheyne

Mist sits in the river at Tummel valley near East Haugh, Scotland, Britain January 7, 2021. REUTERS/Russell Cheyne

People watch a drive-in performance from their cars amongst the mist, amid the spread of the coronavirus disease (COVID-19), on Chelmsford City racecourse in Chelmsford, Britain December 11, 2020. REUTERS/Paul Childs

People watch a drive-in performance from their cars amongst the mist, amid the spread of the coronavirus disease (COVID-19), on Chelmsford City racecourse in Chelmsford, Britain December 11, 2020. REUTERS/Paul Childs

Pedestrians wearing protective masks, following the coronavirus disease (COVID-19) outbreak, walk past rainbow created over the mist from a fountain in Tokyo, Japan December 4, 2020. REUTERS/Kim Kyung-Hoon

A farmer is seen inside a car through the front glass covered in mist at the site of a protest against the newly passed farm bills, at Singhu border near Delhi, India December 2, 2020. REUTERS/Anushree Fadnavis TPX IMAGES OF THE DAY

Logging truck is seen as mist hangs over the Tummel Valley, in Pitlochry, Scotland, Britain November 6, 2020. REUTERS/Russell Cheyne

Mist hangs over the Tummel Valley, in Pitlochry, Scotland, Britain November 6, 2020. REUTERS/Russell Cheyne