For the immune system to fight off infection or generate good protection against a disease following vaccination, it needs a variety of micronutrients. This is likely to be just as true for COVID-19 as for other diseases. Given that malnutrition is common among elderly people, raising their vitamin and mineral levels before they get vaccinated could be a way of boosting the effectiveness of COVID-19 vaccines.

How to make COVID vaccines more effective: give people vitamin and mineral supplements — https://theconversation.com/how-to-make-covid-vaccines-more-effective-give-people-vitamin-and-mineral-supplements-154974

Follow the link above to read the entire article. And take your multivitamin.