What are the long term effects-none Again again and again I'll ask: Explain on the molecular level how a mRNA vaccine could possibly have a long term effect? Unbiased article since the author admits, "We will all feel more comfortable..." Great! We have established the fact the author of this article is capable of having feelings. Along with her comment about a rabies vaccine collecting safety data after 7 yrs. What is known is some of the long term effects of the Covid virus. Ask any "long hauler" be it adult or child.