I used to get colds (always started with a soar throat for me) about twice a year (change of seasons usually - Spring and Fall) but I've used ZiCam for about 10+ years, and that works for me IF I get it at first symptom - scratchy throat, eyes watering. Still I've had to use it about 3 times a year until I started vaping over 5 years ago. Now I only have to use it once a year.
I had one cold in five years and that one, I purposely didn't use Zicam

...because I was testing an idea from Nicholas Taleb from his book "Antifragile"
Antifragile - Wikipedia, the free encyclopedia
"Some things benefit from shocks; they thrive and grow when exposed to volatility, randomness, disorder, and stressors and love adventure, risk, and uncertainty." And thus, this makes one 'anti-fragile'
Basically the 'what doesn't kill you makes you stronger' idea

And that preventive medicine, overuse of antibiotics, etc., can set you up for a big fail, make things last longer, etc. etc. And the cold wasn't devastating and didn't last as long as previous colds.