cnn rome's veteran cameraman had a different result. positive, says dr. bersone. he had the virus in the past and has brilliantly overcome it. alessandro never had any symptoms. but our bodies can take time to produce antibodies, so experts caution that these tests may miss some recent current infections, unlike the more common swab tests which should be able to detect whenever someone is shedding the virus. antibody tests like the one i got, quick, painless, inexpensive, just around $20,