Although most people with COVID-19 get better within days, or at most a few weeks of showing symptoms, a number of those "recovered" have experienced post-COVID conditions, or what many in the medical field now call Long COVID.

These conditions vary from new or returning problems related to the virus that patients can experience four weeks or more after first being infected. Medical experts estimate there may be as many as two million Americans who are struggling with these post-COVID physical effects and some say, in extremely rare cases, those symptoms have lasted as long as a year.

Doctors admit that, because of the relative newness of the COVID virus, scientific knowledge is still limited about these effects, including what causes them and if and when they might be recurring.

Most Common Post-COVID Health Problems

LOOK: Answers to 30 common COVID-19 vaccine questions

While much is still unknown about the coronavirus and the future, what is known is that the currently available vaccines have gone through all three trial phases and are safe and effective. It will be necessary for as many Americans as possible to be vaccinated in order to finally return to some level of pre-pandemic normalcy, and hopefully these 30 answers provided here will help readers get vaccinated as soon they are able.