The virus came into existence in 2019 December. Some say it got leaked from wuhan lab where the scientists were creating virus to find its vaccine as this is common, usually scientists first make viruses and then try to find its cure. Other say that it came from bats and it is naturally occuring. My question is, Why in china there is no second wave as its the moat populated country and its death rate stopped suddenly? As compared to other countries where the death rate is very high as well as second wave is still going on.