A healthcare worker administers a dose of vaccine to a woman at the Messukeskus Expo and Convention Centre in Helsinki, Finland, May 31, 2021. (Photo by Matti Matikainen/Xinhua)
A healthcare worker prepares to administer a dose of vaccine to a woman at the Messukeskus Expo and Convention Centre in Helsinki, Finland, May 31, 2021. (Photo by Matti Matikainen/Xinhua)
People wait to be vaccinated at the Messukeskus Expo and Convention Centre in Helsinki, Finland, May 31, 2021. (Photo by Matti Matikainen/Xinhua)