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.
Herd immunity to COVID-19 will take time, says WHO chief scientist Soumya Swaminathan
![Herd immunity to COVID-19 will take time, says WHO chief scientist Soumya Swaminathan]()
Reviewed by Shahid Karimi
on
July 24, 2020
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