People must stay alert to the risk of mosquito-transmitted diseases and take anti-mosquito measures as the monthly average ovitrap index for April rose to 2.9%, from 0.2% in March.

The Food & Environmental Hygiene Department said of the 38 areas surveyed last month, positive ovitrap indices ranging 1.7% to 9.1% were recorded in 24, the highest being Sham Shui Po East. As for port areas, the index also rose slightly from 0% in March to 0.2%.

Although the indices in April were relatively low preventive measures should not be relaxed as dengue cases are prevalent in Hong Kong's neighbouring areas.

More details on ovitrap indices and anti-mosquito measures can be found here. For health tips on Dengue fever click here.