Signs of herd immunity in Delhi? Up to 60% population infected with COVID-19
Pfizer to seek regulatory approval if India places order for COVID-19 vaccine
COVID-19 sero survey shows Delhi closer to herd immunity
China floats fringe theories on COVID-19 pandemic origins
Oxford University mulls trials of coronavirus 'wonder drug'
Google opening up its spaces to serve as mass COVID-19 vaccination sites: Sundar Pichai
KLM to continue long haul flights after relaxation in COVID testing norms
Still a long way from easing COVID-19 lockdown: UK health minister
Pakistan approves Sputnik V COVID vaccine for emergency use
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