13 May 2016

Definition for areas with active Zika virus transmission amended

The definition used by Public Health England, NaTHNaC and Health Protection Scotland for areas with active Zika virus transmission was amended on 12 May 2016 Definition for areas with active Zika virus transmission amended

Previously, the definition specified that for a country or overseas territory to be classified as having current active Zika virus transmission there must be: confirmed autochthonous (locally acquired) cases, acquired by vector borne transmission only, that have been reported by health authorities within the last 2 months.

From the 12 May 2016, the definition will be amended as follows: “For a country or overseas territory to be classified as having current active Zika virus transmission there must be: confirmed autochthonous (locally acquired) cases, acquired by vector borne transmission only, that have been reported by Health authorities within the last 3 months.“ This amendment will be reflected on the NaTHNaC website in the coming days.

This change recognises the availability and quality of current Zika surveillance systems in countries with limited access to testing facilities in the affected area. The advantages of this move include a longer time frame in which to allow reporting of cases, particularly for those countries reporting sporadic cases, and a reduction of risk of countries being removed from the active transmission list while still having, although not reporting, active transmission of Zika virus, such as has been recently observed with Paraguay.

This revised definition will better inform public health and travel advice, particularly in relation to pregnant women, and will also bring the definition used by Public Health England, NaTHNaC and Health Protection Scotland for countries with current active transmission in line with advice issued by the European Centre for Disease Prevention and Control (ECDC).

Resources

Annual Report 2015 - 2016

NaTHNaC publishes its Annual Report 2015 - 2016 Read more

Avian influenza: worldwide update

An update on human cases of avian influenza viruses worldwide Read more

Zika: cases diagnosed in the United Kingdom

Public Health England publishes an update on cases of Zika virus diagnosed in the United Kingdom Read more

Polio: Public Health Emergency of International Concern update

An update on the polio Public Health Emergency of International Concern (PHEIC) Read more

Zika virus: advice on the prevention of sexual transmission

Public Health England has revised guidance for men who have travelled in or returned from an area of high or moderate Zika virus risk Read more
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