Is anyone else getting cold/sick much more often these days?

I know this is probably due to the pandemic + working from home. However I found that I get cold or sick much more often, specifically in the past year.

I had covid this year in October, but even before that I noticed the pattern. For four years at uni I remember getting sick like twice. This year alone I'm sick for like 5th time alone.

I do try to stay active though, I'm running 5k in the gym regularly, I've been to the gym almost 100 times this year. I'm taking multi-vitamins as well. What else can I do to avoid getting cold so often?