inclusion criteria: * 18 years or older, all healthcare workers in direct contact with covid-19 patients (ex: physicians, nurses, pharmacists, etc.), the ability to swallow oral medications, without any gi abnormalities that may affect absorption. who agree to participate in the trial.

inclusion criteria: * 18 years or older, all healthcare workers in direct contact with covid-19 patients (ex: physicians, nurses, pharmacists, etc.), the ability to swallow oral medications, without any gi abnormalities that may affect absorption. who agree to participate in the trial.

inclusion criteria: - 18 years or older, all healthcare workers in direct contact with covid-19 patients (ex: physicians, nurses, pharmacists, etc.), the ability to swallow oral medications, without any gi abnormalities that may affect absorption. who agree to participate in the trial.

inclusion criteria: - 18 years or older, all healthcare workers in direct contact with covid-19 patients (ex: physicians, nurses, pharmacists, etc.), the ability to swallow oral medications, without any gi abnormalities that may affect absorption. who agree to participate in the trial.