inclusion criteria: - men and women aged ≥18 years - hcw or other frontline staff currently in contact with, or anticipated to be in contact with, patients with sars-cov-2 infection. - ability and willingness to provide informed consent. - can be reached by mobile phone for follow-up

inclusion criteria: - men and women aged ≥18 years - hcw or other frontline staff currently in contact with, or anticipated to be in contact with, patients with sars-cov-2 infection. - ability and willingness to provide informed consent. - can be reached by mobile phone for follow-up