Beware of flu vaxes too. They were talking about using mRNA and combining the Covid vax with the flu.. Whether the flu shot ever helps is a crap shoot. Only 1/3 of the time do scientists guess the correct strain of flu to develop the flu vaccine for. For up to 60 days your immune system is lowered and you are more susceptible to any illness, hence flu like symptoms that occur. Having high vitamin D levels is probably the best preventative. At the first sign of illness take Vitamin C and D. Eat healthy, stop the fast food, alcohol and junk foods. Corn syrup is in a lot of the snacks. Masking contributes to throat, lung and dental infections.