Analysis suggests the network centrality of air traffic hubs contribute to seeding dengue epidemics.
New dengue cases are being reported at more than 10 cases per day.
The International Federation of Red Cross and Red Crescent Societies has released new emergency funds to expand the response over the next six months, aiming to assist 307,000 people.
A dengue outbreak has killed at least 21 people in Kerala over the past three weeks.
Through July 12, Sri Lanka case count is 89,885, up from 80,000 reported on July 6.
The outbreak has killed 227 people and infecting tens of thousands.
Sri Lanka has deployed hundreds of soldiers to destroy mosquito breeding grounds to help battle the spread of dengue fever that has killed 215 people so far this year.
Researchers examined 3,194 children from 30 urban sub-districts.
Researchers using positron emission tomography with fluorodeoxyglucose (FDG-PET) as an imaging tool for dengue infection in mouse models uncovered a non-invasive way to track infection in real-time.
The Sri Lanka Ministry of Health puts the dengue case count at 56,887, more than what was recorded in the entire year in 2016.