Why are some Covid-19 patients asymptomatic? Scientists have 2 ideas

While there's no clear answer yet why some people show Covid-19 symptoms and others do not, there are theories. Two of these theories are:

• Some people have a stronger innate immune response to the virus. 
• Some people encounter a smaller viral load. 

Warner Greene, an immunologist and microbiologist at the University of California San Francisco, tells Inverse that the most compelling explanation is the idea that some people's innate immune systems respond incredibly well to the virus. Inverse