Question

What is the difference between a vector and a carrier of disease? Give one example of each.

After the monsoon, many families in a housing colony fell ill with dengue, though the colony's tap water was clean. Residents found water collected in old tyres, flower-pot trays and air coolers. Explain why dengue spread, and suggest three steps residents and the municipality should take.

A town health centre recorded the number of dengue cases from April to September. The data is shown in the bar graph. The monsoon in this town lasts from mid-June to mid-September.