Subject: Science and tech Context: There have been several announcements of companies either entering into agreements to make Covid-19 vaccines or announcing human clinical trials for their candidates in India in the last few months. Concept: Covishield  by University of Oxford-AstraZeneca This vaccine works on a mechanism that uses a weakened and non-replicating version of […]

Subject: Science and tech Context: COVID vaccines mRNA-1273 ChAdOx1 nCoV-19 are currently in human trials. Concept: Vaccines contain the same germs that cause disease. (For example, measles vaccine contains measles virus) But they have been either killed or weakened to the point that they don’t make people sick. Some vaccines contain only a part of the disease […]