Diseases, Conditions, Syndromes

Why India's coronavirus cases have fallen so sharply

With its 1.3 billion population, India has the world's second-highest number of coronavirus infections—more than 10.8 million—but new cases and deaths have fallen sharply in recent weeks.

Diseases, Conditions, Syndromes

Heterogeneous populations develop herd immunity quicker

In rapidly spreading epidemics such as the current coronavirus pandemic, it is usually expected that a majority of the population will be infected before herd immunity is achieved and the epidemic abates. The estimate of ...

Diseases, Conditions, Syndromes

Coronavirus hopes and fears center on 'immunity'

Could exposure to the coronaviruses that cause the common cold help protect against COVID-19? Is herd immunity closer than previously thought?

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