--snip--
The second or Third wave of the virus can be prevented by 100% usage of masks .
Not really, nope. If it could, then the number of infected every day wouldn't have spiked up so much, especially for countries that were relatively prepared for the outbreak. Most of the countries that are done with the pandemic and are opening up nicely are those that actually actively tested and quarantined anyone that was infected. They immediately went for the root of the problem which was the spread of the virus, so they tried to find the sources or the infected, and so they did, which basically caused the number of infections to spike down.
I believe, sadly, that the truth behind the spike in any country's number of infected cases of Coronavirus is that, the costs are so damn high that people don't even go to hospitals for a check-up unless someone else calls the emergency and gives their details so to save their own lives and others' too. That's a fact that people fear a lot to be found a positive of Coronavirus as they believe they should better die instead of being treated as the costs would give them a heart-attack (just like what happened in that $1.1 million bill case).