Stop in for a cup of coffee

Well remember its a two shot vaccine to be effective. From what I've read and the talk of heard immunity I feel its not like a yearly flu shot, but more like a polio or shingles vaccine.
My kids daycare lady, her husband works for one of the companies producing it. He’s said for a month now that the herd thing is best case scenario. He thinks in about 3 to 5 years, it’ll end up going the same path as the yearly flu. But what’s weird is... flu A fb B cases are almost nonexistent this year. It’s all Covid 19. Which doesn’t make sense unless the same people at risk for the flu, are the ones getting Covid 19 now and the immune system as such can kill the flu viruses faster? Which still doesn’t make sense. I don’t know, I’m not a Google expert or pretend to be a medical pro so I’m probably wrong here.