Health
COVID-19 vaccine may not have 100% efficacy: Why a 50 per cent effective vaccine can still eliminate virus – Times Now
The effectiveness of a vaccine will primarily hinge on how widespread the disease already is, how quickly it is spreading (its reproduction rate or R0), and how large a proportion of the population receives it.
- With cases continuing to mount, and India struggling to suppress its daily COVID-19 tally, the nation is effectively pinning its hopes on the development of a vaccine to be distributed as swiftly and widely as possible
- If the virus is spreading at breakneck speeds, the rate of infection will outstrip the rate of immunisation, thereby limiting the overall protection a vaccine offers
- It is overly optimistic to think that the first vaccine produced in I…
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