inclusion criteria: * male or female ≥18 years * willing and able to comply with all study requirements, including scheduled visits, interventions, and laboratory tests * healthy adults or adults in a stable medical condition, defined as not being hospitalized within 3 months prior to the screening visit * subjects who have received two doses of a covid-19 vaccine of any type between 4 to 9 months before the screening visit

inclusion criteria: * male or female ≥18 years * willing and able to comply with all study requirements, including scheduled visits, interventions, and laboratory tests * healthy adults or adults in a stable medical condition, defined as not being hospitalized within 3 months prior to the screening visit * subjects who have received two doses of a covid-19 vaccine of any type between 4 to 9 months before the screening visit

inclusion criteria: male or female ≥18 years willing and able to comply with all study requirements, including scheduled visits, interventions, and laboratory tests healthy adults or adults in a stable medical condition, defined as not being hospitalized within 3 months prior to the screening visit subjects who have received two doses of a covid-19 vaccine of any type between 4 to 9 months before the screening visit

inclusion criteria: male or female ≥18 years willing and able to comply with all study requirements, including scheduled visits, interventions, and laboratory tests healthy adults or adults in a stable medical condition, defined as not being hospitalized within 3 months prior to the screening visit subjects who have received two doses of a covid-19 vaccine of any type between 4 to 9 months before the screening visit