Inactivated virus vaccines like Sinovac have never been known to have adverse effects that show up long after receiving the vaccine. There have been some long term consequences that showed up shortly after the vaccine was given. I haven't even heard of any of those yet.The point being................Si No Vac was more placebo-like. Maybe it saved lives...........and maybe it did not. But one thing is clear, there are no long term studies available on its possible long term effects.