BEIJING — The southern Chinese city of Jiangmen has reported more than 1,700 cases of Chikungunya fever, a mosquito-borne viral illness, prompting authorities to declare a public health emergency, stateBEIJING — The southern Chinese city of Jiangmen has reported more than 1,700 cases of Chikungunya fever, a mosquito-borne viral illness, prompting authorities to declare a public health emergency, state


