Warmer weather is helping drive a surge in diseases transmitted via mosquitos, ticks and fleas in the US, which have more than tripled in the US in recent years, according to the CDC.
The agency assured that summer activities should proceed normally, but warned Americans to be extra vigilant against the critters.
Study author Lyle R Petersen did not link the rise to climate change and said he was under no pressure to avoid doing so. But ticks and mosquito-borne illnesses are thriving in warmer weather, he explained. Human travel, suburban reforestation and a lack of new vaccines are also factors.