The virus is spreading faster than ever before in India despite previous high infection rates in megacities, which should have conferred some protection.
Why would this puzzle scientists? This has been happening in many places where Brazilian and South African variants have been running through previously infected populations. That's essentially how the Brazilian variant was discovered.
Why would this puzzle scientists? This has been happening in many places where Brazilian and South African variants have been running through previously infected populations. That's essentially how the Brazilian variant was discovered.