Article on coronavirus covid-19 for class 9th in hindi only
Answers
The disease is called COVID-19 (Coronavirus Infectious Disease 2019) and the virus that causes it is a type of virus called the coronavirus. It is so named because it bears a set of spikes that resembles a crown (“corona” means crown in Latin).
A number of viruses cause diseases in humans. These include diseases such as polio, measles, influenza (the “flu”) and the common cold. For some of these diseases, vaccines exist. Some of these vaccines, not all, are part of the immunisation schedule of injections you take when you are young. There is a vaccine for the flu which you can choose to take when older, but which needs to be taken every year to provide protection. These immunisations ensure that your immune system can recognise and fight the virus when it enters your body.
The problem comes when the body encounters a virus that it has simply not seen before. This is usually the case with viruses that circulate in animals or birds, for example, pigs, chickens and bats, under normal circumstances. Occasionally, these viruses can “spill-over” into humans, causing novel diseases. COVID-19 is one such disease. The virus for it is believed to have originated in bats.
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