WASHINGTON, Dec 5, (Agencies): In a recent study published in The Journal of Allergy and Clinical Immunology, scientists have unveiled a compelling explanation for the increased occurrence of respiratory illnesses during the winter months. The research reveals that cold air can detrimentally impact the immune response in the nostrils, with even a minor temperature reduction of 9 degrees leading to the potential loss of nearly 50% of virus and bacteria-fighting cells in this area.

Dr Zara Patel, a professor at Stanford University School of Medicine, highlighted the significance of this discovery, stating, "This is the first time that we have a biologic, molecular explanation regarding one factor of our innate immune response that appears to be limited by colder temperatures." Rhinologist Dr Benjamin Bleier, director of otolaryngology at Massachusetts Eye and Ear and an associate professor at Harvard Medical School, emphasized the link between cold air and increased viral infections, pointing out the substantial decrease in immunity caused by a small temperature drop.

However, the study has its limitations, as it relied on in vitro studies involving human tissue in a lab setting rather than direct studies with humans. Dr Patel acknowledged that while in vitro findings are often confirmed in vivo, it is not a guaranteed outcome.

The surge in respiratory illnesses has been alarming in recent months, with a 30% increase in flu hospitalizations reported by the Health and Human Services Department. The data revealed over 11,200 flu-related hospitalizations in the week ending Nov 19, compared to approximately 8,700 the previous week. Concerns are mounting, and health experts anticipate a further rise in flu hospitalizations during the holiday season.

According to the CDC, the current flu hospitalization rate, with 11 out of every 100,000 people affected since October, is the highest in the past decade. The season has witnessed over 6.2 million reported flu illnesses, 53,000 flu-related hospitalizations, and 2,900 flu-related deaths. Microbiologist and flu expert Scott Hensley urged people to stay updated with their vaccines, noting that this year's vaccines appear to be well-matched to circulating strains. He emphasized, "If there's ever a time to get vaccinated, this is the year to do it."