Flashback in 1918 the Spanish flu they had no Vaccines back then, it wasn't until around 1940 vaccines for influenza became a thing for people. How did the virus end after 2 years and about 25-50 Millions deaths, eventually people became immune to it and in 1920 in what they call the 4th wave wasn't as deadly anymore.
Flash forward to now, and we're in the 3rd wave with Vaccines going out, but our means of transportation are much more extreme then back in 1918-20. I see so many similarities between these two, besides the part where people turned blue back in the day, but my guess is will have to wait until the 4th wave still before we can get this virus under control or the body starts being more immune to it.