People are becoming more aware of hygiene due to the spread of the coronavirus and taking measures such as sanitizing hands more often and wearing masks.

They are. And this is one aspect I hope remains when the scamdemic finally ends.

I guess this is good, but I worry that people's immune systems will become weakened if not challenged enough.

Hygiene is good of course, but I would hope that wearing of masks is a temporary thing for Covid-19 and other pandemics in the future. I do not want to wear one the rest of my life or all winter, every winter just to reduce flu risk.

Good hygiene is important, but our immune systems require exposure to bacteria and viruses to keep them strong. If we are not exposed to these things, we lose our natural immunity to them, and make ourselves more susceptible to serious illnesses when a chance exposure occurs.

European diseases wiped out countless people in the new world, who had no natural immunity to them.

We know from long experience that kids and adults who live and work on farms have a much higher resistance to common sicknesses due to their exposure to their less-than-clean environments.

To clarify, I meant hand washing and hygiene. As for face coverings, I wish those accursed things would go ASAP

Staying away from people, doing some basic personal hygiene, and wearing masks will protect most people from most diseases.

As for 'boosting' our immune systems, the research seems to show that exercise, healthy eating habits (including veggies & fruit), good sleep, and reduce stress are the only ways to generally 'improve' our immune systems.

However, babies need to get some microbes in order to even have an immune system and children exposed to colds and viruses have stronger immune systems as adults. By children, I mean less than three years old.

As adults, there is little we can do to boost our immunity, other than the above, but we can protect ourselves from specific diseases with, wait for it, vaccines.

https://www.cedars-sinai.org/blog/boosting-your-immune-system.html

https://www.health.harvard.edu/staying-healthy/how-to-boost-your-immune-system

https://www.nature.com/news/early-exposure-to-germs-has-lasting-benefits-1.10294

http://www.nbcnews.com/id/48489391/ns/health-childrens_health/t/ask-dr-ty-will-early-exposure-colds-boost-immunity/#.X2lwOy1h1TY

You cannot “boost” your immune system. It’s nonsense.

You cannot “boost” your immune system. It’s nonsense.

Only as a measure of terminology. It is possible however to improve your body’s ability to provide an immune system response.

“wearing masks will protect most people from most diseases.”

Dubious findings at best