I don't think so. A few years ago I had some severe allergic reaction to some food stuff and I was on prednisone for half a year. The initial daily doses were h

I don't think so. A few years ago I had some severe allergic reaction to some food stuff and I was on prednisone for half a year. The initial daily doses were huge (about 100 mg). I don't remember I had any severe colds, or any colds at all. I'm not 100% sure, but at least if I had any cold, it was not bad enough to stay in my memory. Certainly not to send me to the hospital. The funny thing about colds is that you don't die from them, you die from the immune response. That's why the first effective countermeasure to Covid-19 was dexomethasone, an immunosuppressant. Even before Covid-19 became a pandemic, and it was just a thing in Italy, I read about some asthma inhaler as being helpful, and asthma inhalers are just immunosuppressants. In principle if you give someone absolutely massive doses, then maybe a cold just kills them. But, based on my sample of 1, you would need lots of pills to do that. The highest prednisone dose is 20 mg. Five pills will not make you more vulnerable to a cold. How do you make someone take ten pills without them knowing? And do that for a few days in a row? And there's no guarantee that 10 pills daily will do the job.