NEW: Trump recommends offering separate vaccines for Measles, Mumps, and Rubella

As Trump was making announcement about possible causes of autism being linked to Tylenol taken in pregnancy, he added guidance for vaccines.

"The MMR, I think should be taken separately. This is based on what I feel, the Mumps, Measles and [Rubella]. The three should be taken separately. And it seems to be that when you mix them, there could be a problem. So there's no downside in taking them separately. In fact, they think it's better, so let it be separate. The chicken pox is already separate, because when that got mixed in, I guess they made it four for a while it really was bad. So they make chicken pox individually," Trump said.

During the press conference, Trump also talked about the possible link between taking Tylenol when mothers are pregnant and autism.

The president said that “effective immediately” the FDA is “strongly recommending that women limit Tylenol use during pregnancy unless medically necessary. That's for instance, in cases of extremely high fever that you feel you can't tough it out.”

Robert F Kennedy Jr also spoke at the press conference, where he said that the FDA would help to begin the process to make a safety label change, and encouraged doctors to only have pregnant women take it with limited doses if absolutely necessary.

Kennedy also said that autism may be linked to folate deficiency.