An elderly woman and girls gather to watch the celebrations to mark Eid-e-Milad-ul-Nabi, the birth anniversary of Prophet Mohammad, in Karachi, Pakistan October 19, 2021. REUTERS/Akhtar Soomro

An elderly man receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

An elderly woman receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

An elderly man receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

An elderly man receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

An elderly man receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

An elderly woman receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

An elderly man receives a coronavirus disease (COVID-19) vaccine booster coinciding with the flu vaccination campaign in Seville, Spain October 18, 2021. REUTERS/Marcelo del Pozo

Men help evacuate an elderly woman after gunfire erupted, in Beirut, Lebanon October 14, 2021. REUTERS/Mohamed Azakir

Men help evacuate an elderly woman after gunfire erupted, in Beirut, Lebanon October 14, 2021. REUTERS/Mohamed Azakir

An elderly voter is assisted during the parliamentary election, in Baghdad, Iraq, October 10, 2021. REUTERS/Thaier al-Sudani

An elderly voter is assisted during the parliamentary election, in Baghdad, Iraq, October 10, 2021. REUTERS/Thaier al-Sudani

An elderly voter is assisted during the parliamentary election, in Baghdad, Iraq, October 10, 2021. REUTERS/Thaier al-Sudani

An elderly voter is assisted during the parliamentary election, in Baghdad, Iraq, October 10, 2021. REUTERS/Thaier al-Sudani

Iraqi security forces pose for a photo with an elderly man after he cast his vote, as Iraqis go to the polls to vote in the parliamentary election, in Baghdad, Iraq October 10, 2021. REUTERS/Haider Kadhim

Palestinian grandmother Jihad Butto, 85, celebrates obtaining a bachelor's degree in religious studies with her family at her home in Nazareth, Israel October 9, 2021. Picture taken on October 9, 2021. REUTERS/Ammar Awad

Palestinian grandmother Jihad Butto, 85, tends to her garden at her home in Nazareth, Israel October 8, 2021. Picture taken on October 8, 2021. REUTERS/Ammar Awad

Palestinian grandmother Jihad Butto, 85, reviews her university notes, after obtaining a bachelor's degree in religious studies, at her home in Nazareth, Israel October 8, 2021. Picture taken on October 8, 2021. REUTERS/Ammar Awad TPX IMAGES OF THE DAY

Palestinian grandmother Jihad Butto, 85, uses her laptop, after obtaining a bachelor's degree in religious studies, at her home, in Nazareth, Israel October 8, 2021. Picture taken October 8, 2021. REUTERS/Ammar Awad

An elderly woman sells vegetables and other foodstuffs next to a mail box of the Russian Post in a street in Omsk, Russia October 4, 2021. REUTERS/Alexey Malgavko

Santiago del Moral's drawing that merited him the second prize in a drawing contest to mark International Day of Older Persons hangs in his room at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Antonio Hidalgo's drawing that merited him the first prize in a drawing contest to mark International Day of Older Persons hangs in his room at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Santiago Moral poses after taking second prize in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Esteban Segura shows psychologist Antonio Jose de la Cuesta his colouring book as he takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Esteban Segura takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Maria Luisa Serrano's drawing that merited her the third prize in a drawing contest to mark International Day of Older Persons hangs in her room at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Antonio Hildalgo poses after getting first prize in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Esteban Segura takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Honorio Vazquez caresses the face of social worker Noelia Porras as he takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Maria Luisa Serrano poses after taking third prize in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Children play at a school playground as Esteban Segura and Horacio Vazquez take part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Pilar Ropero takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Francisca Navarrete takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Residents take part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

A resident takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Staff hang up artwork by residents during a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

Residents take part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera TPX IMAGES OF THE DAY

A resident takes part in a drawing contest to mark International Day of Older Persons at Casaverde nursing home in Navalcarnero, Spain, October 1, 2021. REUTERS/Susana Vera

An elderly man wearing a face mask walks along a street in Madrid, Spain, September 27, 2021. REUTERS/Susana Vera

An elderly woman receives the third dose of the Pfizer-BioNTech "Comirnaty" vaccine against the coronavirus disease (COVID-19) during a vaccination rollout for elderly residents at a nursing home in Seville, Spain September 21, 2021. REUTERS/Marcelo del Pozo

An elderly man receives the third dose of the Pfizer-BioNTech "Comirnaty" vaccine against the coronavirus disease (COVID-19) during a vaccination rollout for elderly residents at a nursing home in Seville, Spain September 21, 2021. REUTERS/Marcelo del Pozo

An elderly woman receives the third dose of the Pfizer-BioNTech "Comirnaty" vaccine against the coronavirus disease (COVID-19) during a vaccination rollout for elderly residents at a nursing home in Seville, Spain September 21, 2021. REUTERS/Marcelo del Pozo

An elderly man receives the third dose of the Pfizer-BioNTech "Comirnaty" vaccine against the coronavirus disease (COVID-19) during a vaccination rollout for elderly residents at a nursing home in Seville, Spain September 21, 2021. REUTERS/Marcelo del Pozo

An elderly man receives the third dose of the Pfizer-BioNTech "Comirnaty" vaccine against the coronavirus disease (COVID-19) during a vaccination rollout for elderly residents at a nursing home in Seville, Spain September 21, 2021. REUTERS/Marcelo del Pozo

An elderly woman fills out a ballot in her house on the last day of three-day long parliamentary elections in the village of Sintsovo in Nizhny Novgorod Region, Russia September 19, 2021. REUTERS/Anastasia Makarycheva

An elderly woman looks at the ballots as members of a local election commission visit her in her house on the last day of three-day long parliamentary elections in the village of Duplevo in Nizhny Novgorod Region, Russia September 19, 2021. REUTERS/Anastasia Makarycheva TPX IMAGES OF THE DAY

An elderly woman talks to a member of a local election commission in her house on the last day of three-day long parliamentary elections in the village of Duplevo in Nizhny Novgorod Region, Russia September 19, 2021. REUTERS/Anastasia Makarycheva

A man carries a portable cooler containing vials of the Sinopharm vaccine as healthcare workers go from door to door to inoculate the elderly and people with disabilities against the coronavirus disease (COVID-19), in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A woman receives a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A nurse leaves a house after vaccinating a woman with a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

Healthcare workers go from door to door to inoculate the elderly and people with disabilities against the coronavirus disease (COVID-19), in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A man receives a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A nurse prepares a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A nurse leaves a house after vaccinating a man with a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A women receives the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A man receives a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela September 18, 2021. REUTERS/Leonardo Fernandez Viloria

Healthcare workers go from door to door to inoculate the elderly and people with disabilities against the coronavirus disease (COVID-19), in Caracas, Venezuela September 18, 2021. REUTERS/Leonardo Fernandez Viloria

A nurse prepares a dose of the Sinopharm vaccine against the coronavirus disease (COVID-19), as healthcare workers go from door to door to inoculate the elderly and people with disabilities, in Caracas, Venezuela September 18, 2021. REUTERS/Leonardo Fernandez Viloria

Healthcare workers go from door to door to inoculate the elderly and people with disabilities against the coronavirus disease (COVID-19), in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria

Healthcare workers go from door to door to inoculate the elderly and people with disabilities against the coronavirus disease (COVID-19), in Caracas, Venezuela, September 18, 2021. REUTERS/Leonardo Fernandez Viloria