For AOS after K1, my fiancée is required to have been vaccinated for MMR, Diptheria, Tetanus, Varicella and Hep B.
My fiancée did have chicken pox so she doesn't need to be vaccinated for Varicella, however, a verbal or a self-written declaration to the the US panel physician won't be sufficient.
I am inclined to say that even a declaration/letter from a doctor in a local hospital won't be sufficient either.
I think a documentary evidence will be needed along with a declaration.