Dengue risk still high due to low herd immunity, more people working from home

SINGAPORE: The surge in dengue cases is due to a"confluence of factors" such as low immunity to certain serotypes of the virus, said the National Environment Agency on Wednesday as the number of cases hit aA total of 22,403 dengue cases have been reported so far this year, surpassing the annual high of 22,170 in 2013. Twenty people have died from dengue this year as of Aug 2.

The level of exposure to dengue among young adults here is relatively low, according to the latest study by NEA, published in 2015. This serotype was last dominant in Singapore about three decades ago, but it has been dominant from January to April this year, said NEA.A single housing block in Senja has become one of the most badly hit by Singapore's worst dengue outbreak. Thirty-three residents are infected. Those living in the area say they have seen more fogging and inspections although some suspect the mosquitoes have been breeding not only inside homes, but elsewhere. CNA reports.

The warmer and wetter weather as well as the increase in the mosquito population in many areas"carried the momentum of the high dengue case load of the first four months of the year over to the following months", said NEA. "With more people staying at home, there would be more human hosts for the female Aedes aegypti mosquitoes to target, which is a day-biter and harbours within the indoor environment, and this would have partly contributed to the recent increase in cases," said the agency.

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