SummaryDelhi has seen an early spike in mosquito-borne illnesses this monsoon, with over 277 dengue and 12 malaria cases by late July. Globally, chikungunya is surging in China. Experts stress prevention, advising correct repellent use, DEET, picaridin, or oil of lemon eucalyptus, alongside nets, treated clothing, and eliminating stagnant water to curb outbreaks.