Stage 1 - In the first stage, the disease doesn't spread locally, which means people who have had a foreign-travel history to an already affected country. Stage 2- This is the local transmission stage. The people who have contracted the virus and travelled to another country and the virus gets transmitted to other people, usually family and friends. In stage two, it is very easy to trace the source and quarantine affected people. Stage 3 - At this stage, the source of the infection is untraceable and once it spreads it's difficult to control. People who are infected don't have any travel history and haven't come in close contact with a confirmed coronavirus person. Stage 4 - At this stage, the spreading of the virus is uncontrollable and the clusters of infection start developing in a country. An example of this stage so far is China. Coronavirus Face Masks: Types, When And How To Use … [Read more...] about COVID-19: What Is Community Transmission? Has It Affected India Yet?