Bird flu, a virus that infects birds, is causing concern among scientists who believe it may become airborne. Like Covid, which spreads through the air, bird flu could also spread this way. In China, experts locked down many people in 2020 to try to stop Covid from spreading. Lidia Morawska, an air quality expert, thought Covid was spreading through the air in tiny droplets from infected people. She warned that standard measures like disinfecting surfaces might not be enough to stop the spread. However, medical journals rejected her warnings, and it took over two years for the World Health Organization to agree that Covid spreads through the air. Now, scientists are worried about bird flu potentially becoming airborne. Last year, 66 people in the US were infected with a type of bird flu called H5N1, likely from handling infected birds. Cows were also found to have the virus, which could pass to people through droplets from milking machinery. If bird flu can spread from person to person, it could cause a pandemic. Experts are watching for any changes that could make the virus airborne, spreading through hospitals, restaurants, and other shared spaces. The scientists are studying how bird flu could spread through the air, just like Covid. People need to be careful around birds and cows that may carry the virus. It's important for everyone to wash their hands often and stay away from sick animals. By understanding how diseases spread, scientists can work to keep everyone safe from illnesses like bird flu.