Scientists have identified a rare inherited genetic mutation that can increase a person’s risk of developing lung cancer by roughly 25 times overall and by about 60 times among non-smokers, according to landmark research published in the journal Science. The study, conducted by investigators at the Dana-Farber Cancer Institute alongside the 23andMe Research Institute, analyzed de-identified genetic data from more than 3.3 million individuals. Researchers identified the germline variant, known as EGFR T790M, as one of the strongest inherited risk factors for lung cancer discovered to date.

South Kivu has reported no new Ebola cases since May, adding to evidence of improvement in some affected areas. WHO Director-General Tedros Adhanom Ghebreyesus said recent trends offered encouraging signs after months of widespread transmission. He also said the outbreak continues to expand and cause deaths. Health authorities have identified cases across 62 health zones, underscoring large differences between provinces. Declining transmission in some locations has occurred alongside sharp increases elsewhere in the country.

Preliminary testing detected Legionella DNA in a cooling tower at Yankee Stadium as New York City investigates a Legionnaires’ disease cluster in the South Bronx. The city had confirmed 11 cases by Tuesday night, including one death. Three people remained hospitalized. The New York City Health Department identified 10 cooling towers with positive preliminary PCR results across ZIP codes 10451 and 10456, which cover parts of Melrose and Morrisania.