1. During influenza infections, most viral shedding occurs within a few days of illness onset. 2. Children may be more infectious than adults because they shed more virus. 3. The degree of viral shedding (infectiousness) correlates with symptoms and tympanic temperature.
Cowling BJ, Chan KH, Peiris JS, Riley S, Leung GM. (2013). Viral shedding, clinical history and transmission of influenza. Hong Kong medical journal = Xianggang yi xue za zhi, (19 Suppl 4)