The first severe case of bird flu in the US includes unique mutations, as per CDC. These mutations, found in the patient’s respiratory sample, are rare but typically seen during severe infections. The mutations may enhance the virus’s ability to infect human cells but haven’t been found in birds, suggesting they developed during the patient’s infection. Public risk remains low. The first severe case of bird flu in the US includes unique mutations, as per CDC. These mutations, found in the patient’s respiratory sample, are rare but typically seen during severe infections. The mutations may enhance the virus’s ability to infect human cells but haven’t been found in birds, suggesting they developed during the patient’s infection. Public risk remains low. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle