Detection rate of HMPV, RSV and Influenza virus (A and B) among patients hospitalised for severe acute respiratory illness at all sites, by month and year: 2009–2013. Detection rate – number testing positive divided by total number of samples tested per month × 100.
Footnote: In 2013 enrolment at Chris Hani Baragwanath Academic Hospital was down-scaled, with enrolment of paediatric patients limited to two of the five working days and adult patients to one of the five working days. Enrolment in 2013 at the other five hospitals continued as previously, with enrolment from Monday through Friday.