30-07-2021, 11:29 PM
(CNN)Vaccination alone won't stop the rise of new variants and in fact could push the evolution of strains that evade their protection, researchers warned Friday.
They said people need to wear masks and take other steps to prevent spread until almost everyone in a population has been vaccinated.
https://us.cnn.com/2021/07/30/health/vac...index.html
They said people need to wear masks and take other steps to prevent spread until almost everyone in a population has been vaccinated.
https://us.cnn.com/2021/07/30/health/vac...index.html