Answer :
c) These strategies help reduce transmission; even when drug-based treatments and vaccines are unavailable, helps gain immunity.
During epidemics like corona, drugs and vaccines are not available every part of the country and villages as it was newly discovered virus and was not possible to vaccinate such large population in such a short time.
Hence, from this concept of community immunity arises, where such as community wear masks, frequent hand washing, and social distancing helps to stop the fast spread of virus in the community, which in turns help other people till more than half of population is vaccinated to develop community immunity.
This step is done to protect the virus from spreading from one person to another before the development of vaccine and community immunity.
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