Tag: undetected

(HealthDay)—For many city-dwelling teens with asthma, their chronic lung disease may go undiagnosed and untreated, a new study finds. According to a survey of more than 33,000 New York City high school students, 20 percent reported having asthma-like symptoms, but were not diagnosed with the illness. The researchers also found that teenage girls and Asian-Americans

People showing virtually no symptoms are likely the primary source of dengue fever, according to new research published in PLOS Pathogens. Nearly 400 million people each year are infected with dengue virus, which is transmitted through mosquitoes. The study estimates that more than 80 percent of dengue virus infections are attributable to individuals with mild