In this letter to the Editor, the authors argue that Vitamin C has been shown to decrease the severity of at least one coronavirus infection, the common cold. Thus, it is possible, even likely that vitamin C would also have a positive effect against infections by other coronaviruses, including Sars-CoV-2 infections leading to COVID-19. In addition, since Vitamin C has been shown to improve outcomes in patients admitted to the ICU, there may be additional benefits. Comment: at this point in time, it appears that SARS-CoV-2 is highly infectious, and that large segments of the population will get infected regardless of social distancing policies or mask policies. While social distancing and masking slows down transmission, right now it seems that these measures will not stop the spread of the virus. Since there are no known good treatments for COVID-19 right now a great strategy is to build up your immune system, now. Building up the immune system is simultaneously complex and simple.