I often see people write, that you can not have 2 visas at the same time. I have an O-A visa. I just applied and got an METV also. The O-A expires later this month. I am coming for 6 months, and would prefer to use the O-A as I would not have to leave the country and/or extend. I bought a travel insurance as it has much better coverage than a health insurance. It is also much cheaper.
I would prefer to use the O-A, but I doubt it will be accepted without a normal health insurance.
Will it be a problem to come with 2 visas and ask if I can use the O-A. If I can not, I will use the METV.
If I am not allowed to have 2 visas, maybe I should not try to ask.
TLDR : Answer Summary
The poster is concerned about using their O-A visa after obtaining an METV, questioning the validity of holding two visas concurrently and the requirements regarding health insurance. The comments suggest not to disclose holding two visas to immigration, as the O-A visa is already in the system. There's uncertainty regarding acceptance of the O-A without normal health insurance, and the risk of visa expiration is raised. Ultimately, it's noted that the decision rests with the immigration officer at the time of entry.