The National Institute of Health has published its Boletín Epidemiológico for week 18. The Zika information, which begins on page 91, is as always highly detailed. Even if you don't read Spanish, you should be able to get a sense of what's been going on. Here's my summary of some key points:
From the start of the Zika outbreak in week 40 of 2015, through to week 18, 4,867 cases have been confirmed. Another 75,926 cases are clinically suspected. In week 18, 2,708 cases were reported—1,457 from this week and 1,251 delayed reports from earlier weeks. Of this week's cases, 1,116 were confirmed and 1,592 suspected. The departments with 54.6% of all cases are Valle del Cauca, Norte de Santander, Huila, Tolima, and Santander.
Case reports continue to diminish since week 6, apart from a distinct increase in week 13. The peak of reported cases was in week 5, with 6,307. The average number of cases in the past five weeks is 2,650.
Women have had 66.62% of all cases; 61.43% are working-age adults, and 13.97% are 25 to 29. Babies under one year are 2.6% and persons over 65 are 3.4% of all cases.
Pregnant women diagnosed with Zika virus
Since the start of the outbreak up through week 18, 2,948 cases have been confirmed in pregnant women, with suspected cases in 11,417 others who reported symptoms compatible with Zika virus. Norte de Santander has the highest number of such cases (2,462, or 17.14%).
Intensified surveillance for microcephaly
Between weeks 1 and 18 of 2016, five Zika-associated microcephaly cases have been confirmed; 24 cases were discarded and 43 remain under sutyd.
Special surveillance for neurological syndromes with Zika-compatible antecedent illness
Between December 15, 2015 and up through week 18, 517 cases of neurological syndromes have been reported to epidemiological surveillance. All are being verified. Men make up 57.1% (295 cases) of neurological syndromes; 12.4% (64 cases) are over the age of 65. Guillain-Barré syndrome, with previous illness compatible with Zika, was diagnosed in 64.79% (335) of these cases.