Dr Siegel discusses health risks from wildfire smoke and lettuce parasite

July 19, 2026 - 22:01

Fox News senior medical analyst Dr. Marc Siegel has raised concerns about two separate but pressing health threats currently affecting the public: the spread of smoke from Canadian wildfires and the emergence of the Cyclospora parasite in lettuce. Speaking on the matter, Dr. Siegel emphasized that wildfire smoke carries fine particulate matter that can penetrate deep into the lungs, posing serious risks for individuals with asthma, chronic obstructive pulmonary disease, or heart conditions. He advised those in affected areas to stay indoors, use air purifiers, and wear N95 masks if they must go outside.

On the food safety front, Dr. Siegel highlighted the Cyclospora parasite, which has been linked to contaminated lettuce. This microscopic organism causes cyclosporiasis, an intestinal infection that leads to watery diarrhea, stomach cramps, nausea, and fatigue. Symptoms can appear days or even weeks after consuming tainted produce. Dr. Siegel recommended thoroughly washing all leafy greens and, when possible, cooking them to kill the parasite. He also urged consumers to check for recall notices from the U.S. Food and Drug Administration. While both issues are serious, Dr. Siegel stressed that awareness and simple preventive steps can significantly reduce the risk of illness.