How a Universal Flu Vaccine Might Work

We've all learned an amazing amount about viruses, immunity, and vaccines over the last two years, thanks to COVID-19. Even if you are are up-to-date with the latest COVID vaccine, you still need to get a flu shot, because influenza mutates like any widespread virus, and different strains come around every year. Some years the flu shot is more effective than others, because they are designed to battle whichever strain our health experts predict will be big that year, and they aren't always right. Keep in mind that "just the flu" is not a thing, because influenza is highly contagious and it's dangerous for many people. But what if we were to develop a flu shot that fights any possible strain of influenza? Immunologists are working on different ways to tackle flu viruses no matter how they have mutated, as explained in this TED-Ed lesson. And now any time I hear the word hemagglutinin, I will think of Napoleon Bonaparte. -via Geeks Are Sexy