Definitely not wrong about Bill Gates. If I remember correctly the Africa polio outbreaks happened during a WHO push for mass vaccination, and I can only assume the Gates Foundation had a hand in it. But, they give oral polio vax in such programs, and OPV is a weakened live virus vaccine which sheds via feces . So without proper hygiene and immune building nutrition, you're bound to see some infection from shedding no matter who is administering it.

You're also not wrong that millions have lived through polio vaccination and are still alive. But, all due respect, please don't assume that means vaccines of any kind are safe. A lot of kids weren't so lucky, especially when the polio vax first came out. Look up the Cutter Incident...at least 40,000 kids were injured due to a failure in the method of inactivation. And that's just the injury that was admitted to.

The possibility that immigrants are bringing disease is moldy concerning, but fortunately the same vitamin/mineral protocols that help prevent covid also help strengthen the immune system in general.