I should have ordered both.
Yeah, but you knew that before you ordered the first test. What changed?
I knew he was going to Africa and I figured he was vaccinated for Hep A and B. That could cause a false positive.
I knew he was going to Africa and I figured he was vaccinated for Hep A and B. That could cause a false positive. [SEP] Yeah, but you knew that before you ordered the first test. What changed? [SEP] I should have ordered both.