inclusion criteria: * adults from melanesian, polynesian, european or other community origin * adults vaccinated with 2 doses of pfizer comirnaty vaccine, administered between 3 and 12 weeks apart * adults planning to be present in the territory and to be available on both sampling dates (1 and 6 months)

inclusion criteria: * adults from melanesian, polynesian, european or other community origin * adults vaccinated with 2 doses of pfizer comirnaty vaccine, administered between 3 and 12 weeks apart * adults planning to be present in the territory and to be available on both sampling dates (1 and 6 months)

inclusion criteria: adults from melanesian, polynesian, european or other community origin adults vaccinated with 2 doses of pfizer comirnaty vaccine, administered between 3 and 12 weeks apart adults planning to be present in the territory and to be available on both sampling dates (1 and 6 months)

inclusion criteria: adults from melanesian, polynesian, european or other community origin adults vaccinated with 2 doses of pfizer comirnaty vaccine, administered between 3 and 12 weeks apart adults planning to be present in the territory and to be available on both sampling dates (1 and 6 months)