Herd immunity to COVID-19 will take time, says WHO chief scientist Soumya Swaminathan

The chief scientist of World Health Organissation (WHO) Dr Soumya Swaminathan warned that 'herd immunity', or when a large section of the population develops resistance to the disease, is still a long way off and can be sped up by a vaccine.

from Zee News :India National https://ift.tt/2ZVQMeg