Weight change of infected animals.

<p>Weight change of 4–6 weeks and 19 month old BALB/c-mice before and after infection with RSV, HMPV or double infection: 4–6 weeks and 19 months old BALB/c mice were infected with 2×10⁷ geq RSV or HMPV, or co-infected with 1×10⁷ geq of each virus. Untreated animals, animals anesthetized and treated with cell culture supernatant or PBS or only anesthetized served as controls. Animals were weighed daily. All values were set in relation to the weight of the animals on day 1. The red line marks the day of infection (n = 5, values are shown as mean).