Key Points

• Since January 1, 2019, 1,184 cases of measles have been reported (compared to 2,306 cases during the same period in 2018), including 378 (32%) hospitalizations (16 in intensive care), 94 cases (8%) complicated by pneumonia, 2 cases of encephalitis, including 1 death (subacute encephalitis in an immunocompromised patient).

• The circulation of the measles virus has intensified, with more than 100 cases reported during each of weeks 18 and 19, compared to 70 cases (on average) during the previous 8 weeks, primarily linked to the outbreak in the Pyrénées-Atlantiques department.

• 80 departments reported at least 1 case during the period.

• 88% of cases occurred in unvaccinated or incompletely vaccinated individuals (out of a total of 831 cases, aged over one year and born since 1980, for whom vaccination status was known).