Someone please help me refute what this doctor is saying about covid

First, the guy describes himself as a functional family medicine doctor. Functional medicine is a pseudoscientific system that ascribes all illness to interactions between environmental factors and the gastrointestinal, endocrine, and immune systems. It’s a form of quackery.

He claims that Covid is spread by aerosol particles that are too small to be filtered by masks. This is nonsense. The evidence is overwhelming that masks are very effective in preventing the spread of the disease. Masks aren’t all equally effective - a triple-layer cloth mask or an N95 mask is much more effective that, say, a gaiter. But this doesn’t mean that masks don’t work.

Then he seems to claim that viruses only make people sick when their immune systems are weakened or “deranged.” More nonsense. Healthy people with well-functioning immune systems get sick from viruses all the time.

He also claims that there are animal reservoirs for the Covid-19 virus, and because of this, no one can make the virus go away. He also says the CDC claims the disease can be completely eliminated. First, as far as I know, no one has identified any animal reservoir for this virus. Second, and perhaps more important, he’s making a straw man argument. Public health officials are not saying we can cause the disease to disappear completely. They are saying that we can greatly reduce the number of cases and the severity of illness if people wear masks and get vaccinated. In fact, only one human illness—smallpox—has ever been completely eradicated. But we have greatly reduced the incidence and mortality of many other diseases, such as polio, measles, diphtheria, whooping cough, and rubella.

He then asks why, if the vaccines are so effective, there’s a breakout in the middle of the summer when “respiratory viruses don’t do that.” He completely ignores the fact that the breakout is almost entirely among the unvaccinated. This has been widely reported. I can only assume he’s being deliberately dishonest.

I gave up watching the video at around 2:25. I’ve had enough. The guy is a dishonest proponent of pseudoscientific nonsense.