Even as the WHO has confirmed India's first three cases of Zika virus in Gujarat the state government on Sunday said there is no reason to worry since effective measures were being taken. The World Health Organisation (WHO) had confirmed that three persons including a pregnant woman were infected in Ahmedabad city by the mosquito-borne virus. There is no epidemic situation. The three cases are isolated ones. All the patients have recovered and are in good condition Gujarat Chief Secretary J.N. Singh said at a hurriedly convened press conference here. He claimed 1.25 lakh blood samples had been drawn to