If we both believe in the same science, then no one at the start of the pandemic was ever immune.

Wrong

Just based on history, foreign diseases have always been bad news. Ask the Native Indians when they got smallpox.

Speculation. Are you a scientist? An expert on covid19? If not, then why the devil are you spreading misinformation?

With that information, governments had to do something. It was never a wise idea to "just ignore it" or leave it to herd immunity.

You don't know that. You are speculating. It is not science.

Australia & Vietnam proved this. Close the borders, use strict lockdowns. Very few people died while the economy stayed the same.

You don't know this. It is speculation. It is not science.

If everybody did this, we wouldn't have had to worry about a 1st or 2nd wave.

We don't have to worry about the 1st or the 2nd wave. It isn't a pandemic.