I believe that it is worth taking a complex of vitamins, and not just one. It is very important to fight the coronavirus comprehensively. While we wait for the vaccine to become available to everyone on the planet, we must keep our immune system at an excellent level. To do this, you should eat right, play sports, take high-quality vitamins. By the way, on the page
https://immunedefence.info/studies, you can read the research of this company about its vitamins and preparations to support the immune system. I have been using Immune Defense products for several years now and am pleased with the results precisely because everything has been thoroughly tested and scientifically proven. For example, an Australian study showed that “compounds from elderberries can directly interfere with the entry and replication of the virus in human cells and can help strengthen the human immune response to the virus.” Very important for each of us.