Zika virus (ZIKV) – Incidence and Trends
Available data reported suggests a downward trend in reporting of Zika virus cases in the Region of the Americas (Figure 1). However, some countries and territories (Dominican Republic, French overseas collectivities in the Americas, Haiti, and Venezuela) are experiencing an increase in Zika virus reports. Due to delays in reporting and further geographic spread of Zika virus to areas that have the vector-mosquito capable of transmission, the epidemiological curve is subject to change.
On 15 March, Dominica and Cuba reported the first autochthonous (locally-acquired) confirmed cases of Zika virus infection in their countries, bringing the total to 33 countries or territories reporting local, vector-borne transmission of Zika virus in the Region of the Americas (Figure 2).
Analysis of age-specific attack rates for suspected Zika virus infection for Colombia and El Salvador (Figures 3 and 4) show that the highest attack rate for both countries is observed in the age group of 20-29 years; however, the highest attack rate is observed in adults aged 20-39 in Colombia and 20-49 in El Salvador.
