We decided against the flu shot and good for us, we did not succumb to advertising aimed to get one, even for free.
Vitamins A, C and D are indispensable in keeping the immune system strong. The immune system protects against most infectious diseases. However, some germs are formidable foes because by constantly mutating they can break defenses easily. To protect ourselves, we are looking towards vitamin supplements for help and each year it seems to become more urgent to find stronger ones.