Buoyant aerosol: Smaller droplets, less than five microns, evaporate faster than they settle, hence, get carried away by air to longer distances.

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Useful discovery: The antibody could help block infection in cultured human cells.

Monoclonal antibody to block coronavirus infection identified

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Mannequins covered with face masks displayed at a shop in Bengaluru’s Rajarajeshwari Nagar on Tuesday.

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Herd immunity: The concept is generally used to calculate how many people will need to be vaccinated in a population in order to protect those who are not vaccinated.

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