The aliens play both sides. They direct world affairs, there is not a major event that is without them, meaning that the virus/vaccine plays into their agenda. Nothing on a such a scale is left to chance. That would be disaster.
Everything that they do is multifunctional, long-term, and when it has the chance to deceive or take advantage of humans, they will do so.
So now the virus/vaccine have skimmed-off a few, good, more souls for the alien coffers, and more practice for the military-industrial world government that rules from underground.
That the aliens have infiltrated all major industries, and have no trouble simply waltzing into any place, they all knew full well what the vaccine would portend. Here's where it gets diabolical...
After the scripted intro, the aliens that "arrive" first will have had sufficient intel and research on how to reverse the vaccine. How convenient! An implicit admission that they know what it does but didnt tell anyone, that they can infiltrate our data systems from multiple distances, that they have an even more advanced knowledge of our biology than theyve admitted but didnt bother to use it, EXCEPT WHEN MOST OPPORTUNE to subsequently admonish and blame the governments and pharmaceutical companies for making such a bad thing, well, the saviors have arrived with the antidote and to win over your hearts and minds with the rendering of their caring aid.
Do you see what that is? The aliens pressured and fomented the major even