Many people all over the world are affected by covid-19 and most of them are asymptomatic and the pandemic is spreading from them. How it's possible ?If the person is asymptomatic what it means?
Find that many infections are fought off by the body without the person even knowing it. In the case of the flu, estimates are that anywhere from 5% to 25% of infections occur with no symptoms. For the most part, symptoms are actually a side effect of fighting off an infection. It takes a little time for the immune system to rally that defense, so some cases are more aptly considered presymptomatic rather than asymptomatic.
From the link that is entitled:
Preventing the spread of the coronavirus
https://www.health.harvard.edu/diseases-and-conditions/preventing-the-spread-of-the-coronavirus
There are three types of infections in case of COVID-19: mild, severe and critical. In case of mild infections, the number and toxicity of the virus is less and hence it exerts less pressure on the human body and also there is a strong immune system that hinders the virus. In mils infection, usually there are no symptoms although the person is a career.
Dear Muhammad Sohail Amjad Makhdum, many thanks for your valuable explanation.