The inclusion of routine PCR screening in addition to IgM serology in Uganda would improve the sensitivity of measles diagnosis, as recommended for this reason “where possible” by the World Health Organisation (WHO).24, 25 Ongoing measles outbreaks are of concern as there are 140,000 deaths per year from measles globally, mostly in children under 5 years of age.26 This evidence concerns the gene CD40LG and measles.