Infectivity of severe acute respiratory syndrome coronavirus 2 in children compared with adults.

The median TCID 50 /mL was significantly lower for children aged 11–17 years (316, IQR 178–2125) than adults (5620, IQR 1171–17 800, p < 0.001), but differences between adults and children 10 years old or younger (1171, IQR 316–5620, p = 0.1) did not reach statistical significance ( Table 1 and Figure 2 ).

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