Talk to General Physician on General Immunity & Health

Salam. I am a 23 year old female. I m living with my parents. My query is that Alhamdullilah we are healthy however looking at the current situation I just want to ask whether my parents and I should take any multivitamin to keep ourselves healthy and boost our immunity? What vitamins should we take? I take care of my food as I try my best to eat healthy and take plenty of water. But please guide me other than good food, water and exercise is there anything more that I should take ? And if yes how frequent? I hope my question was clear.