The vaccine campaign targets 610,000 people in South Sudan's Western Equatoria state.
The new cases come after the CDC urged health providers to watch for fever and rash in people who had traveled overseas.
The new center in Tokyo will support collaboration to better prevent, detect, and respond to public health threats in the region.
The new detection comes just a week after the CDC warned health providers about a rise in imported measles cases.
GSK has applied for expanded RSV vaccine use in adults ages 50 to 59 who have underlying health conditions.
Imported measles cases are rising, with two localized outbreaks reported.
Officials recently warned that Europe's measles cases rose more than 30-fold in 2023.
At tomorrow's hearing, Senators will hear from long-COVID patients, doctors, and researchers.
Health officials are identifying people who were exposed, including those on specific flights.
In November, Cameroon said it would receive 331,200 doses of the RTS,S vaccine, which is produced by GSK.