Fig 1.
A: Number of infections by month in the cohort and in Egypt. B: Suspected, index, and secondary infections of COVID-19 in the cohort.
Fig 2.
Transmission of COVID-19 infection among close contact households.
Except for the dark blue legend, legends indicate the day for the first PCR positive test.
Table 1.
Occurrence and duration of symptoms among index and contact infections.
Fig 3.
Distribution of antibody titers among infected index and contact infections 14 days post infection.
Fig 4.
Distribution of neutralizing antibodies among cohort participants, July and October 2020.