inclusion criteria: - healthy adults (any gender, ages 18 to 60 years old) in good general health, based on medical history - sars-cov-2 infection >4 months prior confirmed by a positive polymerase chain reaction (pcr) or antigen test - body mass index (bmi) of 18.5-39.9 kg/m2 - agreement to comply with the protocol and study restrictions - access to internet in addition to willingness and ability to use web-based questionnaires - available for all study visits - english-speaking

inclusion criteria: - healthy adults (any gender, ages 18 to 60 years old) in good general health, based on medical history - sars-cov-2 infection >4 months prior confirmed by a positive polymerase chain reaction (pcr) or antigen test - body mass index (bmi) of 18.5-39.9 kg/m2 - agreement to comply with the protocol and study restrictions - access to internet in addition to willingness and ability to use web-based questionnaires - available for all study visits - english-speaking