Figure 2.

Suggested framework of the subnational respiratory virus surveillance under the WHO national influenza centers (NIC) and its linkages with the WHO collaborative centers (CCs) and global influenza surveillance and response system (GISRS).

#Number of NICs may be one or more depending on the country's population density.

*Several RRLs to be operational under the NIC. Number will depend on the country's population density.

**Number of community and hospital centers operational under RRLs for ILI/SARI surveillance will vary depending upon the size of the province and population density in the particular area.