RE:How is a diagnosis of Zika infection any benefit to anyone If there were no symptoms advise the patient perhaps not to donate blood or get pregnant until the safe amount of time has elapsed. Should wierd complications set in months later it could be related to the virus. Perhaps they could be a carrier and unknowingly infect others although asymptomatic themselves. There is so little they know about this virus I'd imagine these people would need/want to be followed for a while.