Confirmation of infection by PCR in a family member Informed written consent Living in Tehran Number of family members between 2 and 5 Age between 18 to 63 years No prognostic signs of Covid-19 disease two weeks before enrollment

Confirmation of infection by PCR in a family member Informed written consent Living in Tehran Number of family members between 2 and 5 Age between 18 to 63 years No prognostic signs of Covid-19 disease two weeks before enrollment