One reason for the limited scope of large-scale diagnosis is the lack of testing facilities. KEM Hospital is the only hospital in the city that tests patients for the Zika virus. Apart from that, the National Institute of Virology (NIV) in Pune is the only diagnostic facility for Zika testing in the state. This is also the case across the country there is only the National Centre for Disease Control (NCDC), in Delhi, and a few selected virus research and diagnostic laboratories of the Indian Council of Medical Research (ICMR) that tests for ZIka.

“This is because the testing kits are expensive and require molecular testing,” said Dr Pawar. KEM’s microbiologist Dr Chaya Kumar said that even though her department has kits for testing Zika, they have not received requests for investigations in the recent past. Dr Daksha Shah, who heads BMC’s public health department, said, “It is only when someone presents with symptoms that doctors test for it.” Most people infected with the Zika virus do not develop symptoms. Among those who do, symptoms typically appear 3 to 14 days after infection. These symptoms include rash, fever, conjunctivitis, muscle and joint pain, malaise, and headache, and usually last for 2 to 7 days.

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A doctor from the department of general medicine at one of the four civic hospitals said, “These are very common symptoms that can be associated with several mild viral illnesses that people experience during monsoons. Every hospital tests people for dengue, malaria, and leptospirosis, which is why we see so many cases. That is not the case with Zika.”

He added that there is a need to test vulnerable populations. “This includes pregnant women and the elderly. One reason why even these populations are not tested could be ‘physician lethargy.’ As the recovery rate is high, relatives of the patients avoid having them tested further as soon as they feel better, and physicians do not bother explaining why they should be tested further either.”