Researchers from the (IITM) have linked high humidity during the monsoon to the increase in daily cases in at least three cities — Pune, Delhi and Mumbai. The findings were published in the international journal, Earth Systems and Environment, recently. Virus particles get a medium like the water vapour droplets in high humidity conditions to stay suspended in the air for a longer time. Drier air helps high evaporation rates of saliva contaminated droplets.