I never seem to get colds myself. Can’t say it’s been as long as you, but its been a couple decades since I had a cold or the flu. I know a lot of people, including my mom and sister, who get several colds a year. Supposedly the average adult get 2-4 a year.
Could have something to do with lifestyle. I haven’t had a cold or flu since before I can remember but my lifestyle is one of mostly staying home and puttering around.
I go food shopping once weekly and to local box store occasionally and that is it. Love reading and listening to music.
This lockdown has not altered my lifestyle one bit.