Rubella infection is a major concern during the first trimester, but infection during the third trimester usually has no ill effect on prenatal development. An increased concentration of alpha-fetoprotein in maternal blood or amniotic fluid suggests that the fe...
Despite considerable size differences, it is one of the three ubiquitous and evolutionary most conserved proteins encoded by nidoviruses. The other two are the chymotrypsin-like protease (3CLpro or main protease Mpro), responsible for most of the proteolytic processing of pp1a and pp1ab, and ...