Dear Bingley: The article didn't explain why the whole population has to get involved immediately. The mosquito
that transmits the disease can breed in quite small quantities of water. Here's statement from Internet:
Research done in Trinidad by D.A Focks and D.D Chadee and published in the American Journal of Tropical Medicine and Hygiene A. 56. (1997) 159, has identified outdoor drums, water storage tanks, buckets, laundry tubs, discarded tires drink bottles and cans as the most common breeding areas for the Aides Egypti mosquito. Outdoor drums, tubs, buckets and small containers were found to account for over 90% of all Aedes aegypti pupae. It is reasonable to assume that these research results can be applied to the Tobago situation based on similarities in climate and culture.