"Nọmalị, mgbe a dọkịta chọrọ ịmata ma ọ bụrụ na onye e oria na a virus, ha nwere na-eche na ihe virus bụ, na ahụ anya kpọmkwem maka na virus,"Kwuru Stephen Elledge, emi ada oru ngo na Brigham na Inyom Hospital na Boston.
