The number of measles patients in Japan has been growing quickly since the beginning of this year, according to the latest data compiled by the National Institute of Infectious Diseases.
The reported patient count came to 566 for the period between Jan. 1 and May 26, more than double the preliminary figure of 282 for the whole of 2018, the institute said Tuesday.
Among the 47 prefectures, a total of 142 infected patients were reported in Osaka, followed by 96 in Tokyo, 54 in Mie, 50 in Kanagawa and 37 in Aichi.
In just seven days from May 20, at least 20 new patients were reported across the country, including five in Kanagawa, four each in Saitama, Fukuoka and Saga prefectures and three in Miyagi Prefecture.
As the disease is highly infectious, the institute is calling for thorough measures to prevent hospital-acquired infections.