In a follow-up on the measles outbreak on the island of Okinawa, officials with the Okinawa prefectural government put the case count at 99 as of May 16.

Image/Jim Goodson, M.P.H.
Image/Jim Goodson, M.P.H.

The outbreak began on Mar. 20, which has been linked to an imported case from Taiwan.

The outbreak has since spread to Aichi and Kanagawa prefectures and Tokyo.

The government aims to have at least 95 percent of eligible children get both vaccinations, but the goal has been hard to achieve as the vaccination rate remains lower for the second shot.

In fact, thirty-seven prefectures failed to meet the target in fiscal 2016. The lowest rate was found in Okinawa, at 89.8 percent.