Hi, yes, if you contrtacted an std from the oral you could have passed it 4 hours later or even a minute later.
Does anyone have any ideas on this please? I can't seem to find anything about it anywhere else
yes you can pass on a virus without any symptoms once the virus enters your blood stream you can indeed pass it on a virus have an incubation period where it grows and multiply within body cells and this is when you start showing symptoms... 4 hours is too soon to tell
i hope i helped