Fig. 3.

Box and whiskers plot of HRV viral loads (log₁₀ copies/mL) in asymptomatic (n = 33) and symptomatic (n = 85) university students. The solid line represents the median; the bottom and top of the box represent 25th and 75th percentiles, and the whiskers represent the minimum and maximum data points, respectively. Mean difference in viral load was 1.2 log₁₀ copies/mL (95% CI 0.59–1.72; P < 0.001).