Molluscum is a viral infection of the skin and is caused by a pox virus. It spreads through direct skin to skin contact and sometimes sexual contact too.However it is not commonly checked through a std check screen. The diagnosis is a clinical one based on the appearance or the virus could befound through excisional biopsy of the lesions. The average incubation period ranges from 2-7 weeks and thus it could be that you are still having some latent virus or that you have not been infected at all which is still a possibility.I hope this helps answer your question. All the best.
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