"The actual number of deaths from the virus might be somewhat higher, in part because of undercounting or misdiagnosis," says The Washington Post.

"There is little doubt that the number of infections — in many cases among people who either did not get sick or thought they had only a mild illness — is larger than the official case count. The infection rate will not be known until researchers do broad surveys to see who has developed antibodies to the virus."

Read the article here.