Example of claim that it does not weaken the immune system from Abc7News:
"There is no scientific evidence to suggest staying at home weakens your immune system because you're not getting enough exposures," Dr. Patel said. "We build up our immunity over many years, over decades, and this won't take a dramatic hit for spending a few months at home."
Dr. Patel adds that we still expose ourselves to pathogens by going outside and to the grocery store.
Example of claim that it does weaken the immune system from The Center Square:
As the data has come in, which Erickson says he’s collected since December, he asked, “We’ve never ever responded like this in the history of the country, why are we doing this now?”
He said people are worrying too much about the virus because the media is telling them to.
“I’m telling them that sheltering in place decreases your immune system and as we all come out of shelter in place, with a lower immune system and start trading viruses and bacteria, what do you think is going to happen? Disease is going to spike,” he said. “And then you’ve got disease spike amongst a hospital system with furloughed doctors and nurses. This is not the combination we want to set up for a healthy society.”
Neither cite any science. One says there is "no evidence" for it, but does not specify how many studies have even been done on it.