A wounded person is helped by medical emergency after two trains collided in Spain's northeastern Catalonia region, in Montcada i Reixac, near Barcelona, Spain December 7, 2022. REUTERS/Nacho Doce 

A wounded person is helped by medical emergency after two trains collided in Spain's northeastern Catalonia region, in Montcada i Reixac, near Barcelona, Spain December 7, 2022. REUTERS/Nacho Doce 

A wounded person is helped by medical emergency after two trains collided in Spain's northeastern Catalonia region, in Montcada i Reixac, near Barcelona, Spain December 7, 2022. REUTERS/Nacho Doce 

Soccer Football - FIFA World Cup Qatar 2022 - Costa Rica Training - Al Ahli SC Stadium, Doha, Qatar - November 22, 2022 General view as medical staff watch Costa Rica players during training REUTERS/Kim Hong-Ji 

Soccer Football - FIFA World Cup Qatar 2022 - France Training - Al Sadd SC Stadium, Doha, Qatar - November 17, 2022 France's Olivier Giroud receives medical attention during training REUTERS/Kai Pfaffenbach 

People take part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

People take part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

A child practises as he takes part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

Ukrainian musician Sviatoslav Vakarchuk listens to an instructor as he takes part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

Ukrainian musician Sviatoslav Vakarchuk performs as he joins the initiative of a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

People take part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

People take part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

People take part in a massive training on first aid conducted by charitable foundations SMART Medical Aid and Together for Ukraine Foundation, next to the Lviv National Opera, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 27, 2022. REUTERS/Pavlo Palamarchuk 

Medical workers carry on a stretcher a wounded man arriving by a train carrying people evacuated for treatment from Donetsk and Dnipropetrovsk regions, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 21, 2022. REUTERS/Roman Baluk 

Medical workers transport on a stretcher a wounded woman arriving by a train carrying people evacuated for treatment from Donetsk and Dnipropetrovsk regions, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 21, 2022. REUTERS/Roman Baluk 

Medical workers assist a wounded man arriving by a train carrying people evacuated for treatment from Donetsk and Dnipropetrovsk regions, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 21, 2022. REUTERS/Roman Baluk 

Medical workers transport on a stretcher a wounded woman arriving by a train carrying people evacuated for treatment from Donetsk and Dnipropetrovsk regions, amid Russia's invasion of Ukraine, in Lviv, Ukraine May 21, 2022. REUTERS/Roman Baluk 

A member of the special forces takes part in 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

A member of the special forces takes part in 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

Members of the special forces take part in 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

Members of the special forces take part in 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

A member of the special forces takes part in 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

A member of the special forces takes part in 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

People give medical care to a mannequin in a van, as part of Latvian and U.S. medical NATO forces 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

A woman gives medical care to a mannequin, as part of Latvian and U.S. medical NATO forces 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

Latvian and U.S. medical NATO forces move a mannequin, as part of 'Exercise Trojan Footprint' training of medical and casualty night evacuations, during a media tour of the special operations, in Spilve, Latvia, May 10, 2022. REUTERS/Remo Casilli 

Medical workers take a patient into a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers take a patient into a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers take a patient into a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers get patients on a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers get patients on a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers get patients on a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers get patients on a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers get patients on a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Medical workers get patients on a specially equipped train, run by Medicins Sans Frontieres (MSF) in collaboration with Ukraine's Ministry of Health and National Railways, to evacuate wounded people from war-affected areas of eastern Ukraine, amid Russia's invasion of the country, in Dnipro, Ukraine May 10, 2022. REUTERS/Gleb Garanich 

Elena Bulakhtina, a Russian-born Canadian from the Pirogov First Volunteer Mobile Hospital carries her dog Rica, who she rescued during a mission a few days prior, amid Russia's invasion in Ukraine, outside a hospital in Bakhmut, Donetsk region, Ukraine, May 5, 2022. "I haven't seen so much human tragedy before. Absolutely unnecessary suffering," said Bulakhtina, who is using her ability to speak Russian to communicate with Ukrainians from regions like Donbas, where the Russian language dominates. She counts herself lucky to have a Canadian passport and medical training that allowed her entry into the country. REUTERS/Jorge Silva SEARCH "SILVA UKRAINE HOSPITAL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Nicole Spencer, 24, a medical student who suffers from Postural Orthostatic Tachycardia Syndrome (POTS), feeds her emotional support dog Tara, at a coffee shop in Syracuse, New York, U.S. May 3, 2022. Tara is trained to lick Nicole on the occasion she passes out and to detect changes in her heart rate. REUTERS/Magali Druscovich SEARCH "DRUSCOVICH HEALTH SOCIAL MEDIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi TPX IMAGES OF THE DAY 

Yana Zinkevych, founder of the Hospitallers Medical Battalion, sits on a car as volunteers train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Sofia, 16, volunteer of the Hospitallers Medical Battalion, poses for a picture as volunteers train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Volunteers of the Hospitallers Medical Battalion train to provide first aid and evacuate wounded Ukrainian soldiers from the war zone, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, April 20, 2022. REUTERS/Viacheslav Ratynskyi 

Medical workers assist evacuated and wounded people that arrived by special train from Bakhmut and Slovyansk for treatment, amid Russia's invasion of Ukraine, in Lviv, Ukraine April 10, 2022. REUTERS/Roman Baluk 

Medical workers assist evacuated and wounded people that arrived by special train from Bakhmut and Slovyansk for treatment, amid Russia's invasion of Ukraine, in Lviv, Ukraine April 10, 2022. REUTERS/Roman Baluk 

A woman sits in a train as medical workers assist evacuated and wounded people that arrived from Bakhmut and Slovyansk for treatment, amid Russia's invasion of Ukraine, in Lviv, Ukraine April 10, 2022. REUTERS/Roman Baluk 

Medical workers assist evacuated and wounded people that arrived by special train from Bakhmut and Slovyansk for treatment, amid Russia's invasion of Ukraine, in Lviv, Ukraine April 10, 2022. REUTERS/Roman Baluk 

Medical workers assist evacuated and wounded people that arrived by special train from Bakhmut and Slovyansk for treatment, amid Russia's invasion of Ukraine, in Lviv, Ukraine April 10, 2022. REUTERS/Roman Baluk 

Medical workers assist evacuated and wounded people that arrived by special train from Bakhmut and Slovyansk for treatment, amid Russia's invasion of Ukraine, in Lviv, Ukraine April 10, 2022. REUTERS/Roman Baluk 

Ukrainian servicemen attend a medical training as Russia's attack on Ukraine continues, outside Kyiv, Ukraine March 26, 2022. REUTERS/Marko Djurica 

Ukrainian servicemen attend a medical training as Russia's attack on Ukraine continues, outside Kyiv, Ukraine March 26, 2022. REUTERS/Marko Djurica 

Ukrainian servicemen attend a medical training as Russia's attack on Ukraine continues, outside Kyiv, Ukraine March 26, 2022. REUTERS/Marko Djurica 

Ukrainian servicemen attend a medical training as Russia's attack on Ukraine continues, outside Kyiv, Ukraine March 26, 2022. REUTERS/Marko Djurica 

A Ukrainian serviceman attends a medical training as Russia's attack on Ukraine continues, outside Kyiv, Ukraine March 26, 2022. REUTERS/Marko Djurica