IFNB1 and infection: In the model, we consider only one generic type of interferon that accounts for both type I and type III interferons (IFNβ and IFNλs, respectively; our experiments indicate that in the case of infection with RSV, IFNβ plays a decisive role, see Fig D panels a and b in S1 Appendix in conjunction with Fig A panels a, b and Fig E in S1 Appendix).