Individuals who had tested positive for SARS‐CoV‐2 by PCR more frequently cohabited with persons who also had tested positive by PCR, had the IgG type of antibody response, featured IFN‐γ production and CD4+ T‐cell proliferation to nucleocapsid and to spike proteins, more often self‐reported fatigue, anosmia, fever, myalgia, cough, and dyspnea and tended to have higher body weight and BMI (Fig. 5). Here, CD4 is linked to Anosmia.