I haven't got a flu for 5 years since i started this combination. My vitamins against Covid-19!!

So many multivitamins and supplements are available in the market. Which of them are correct against coronavirus? Which combination is best to boost your immune system and effective against viruses especially covid-19 and all other infections. Its all about your immune system and keeping it healthy with right supplements. Here is my strongest combination i have been using for many years and i haven't got a cold for last 5 years !!
Of course healthy diet and exercise needs to support your vitamins.
Covid-19 is a RNA virus which changes its proteins very fast and key to protect against it to keep your immune system ready to cope with all changes and mutations of the virus infections.
There is no immunity against Covid-19 and even when you had the infection in couple of years time you can still catch it. If our immune system is strong it will memorise its all proteins and RNA structure with all similarities every time we have it and it will never be as severe as it was before.
Multivitamins can be confusing and difficult to find in millions of different options but you do not need to be a doctor or pharmacist to select good ones. Main immune system support is based on good quality of life, exercise, sleep and enough hydration. Vitamins will be assisting those to maintain immunity. Good amount of vitamin C and D will maintain mucosal immune system which is the first barrier to virus and other micro organisms. Antioxidant system will be fighting against the micro organisms once they enter the body. As a doctor I tried to summarise my combination.