Just an FYI, I know three people who got herpes through sex.
I have a degree in a biological science and no, there is no reason to fail to disclose because viruses are 'hard to catch'.
The OP and husband did the right thing for them people are free to take the risk if they choose with informed consent.
But to be honest, the sex simply is not worth the risk, however minuscule to me any more, allowing someone else that level of power over my health, for sex?
It's just not worth it, no one in the world is that hot.