There are four main strains of influenza virus – A, B, C, and D. A and B viruses cause the flu season each year. Flu virus strains are always changing and so does the yearly flu vaccine as a result. Type A is generally considered worse than type B. This is because the symptoms are often more severe in type A than in type B. Type A is more common than type B. Researchers suggest that most adults have considerable immunity against type B.
Type A infection can be serious and cause widespread outbreaks and disease. Common symptoms of type A infection can be confused with other conditions. While in some milder cases the flu can resolve on its own without significant symptoms, severe cases of type A can be life-threatening.
Viruses are always changing, and that can cause a new variant, or strain, of a virus to form. A variant usually doesn’t affect how the virus works. But sometimes they make it act in different ways. Scientists around the world are tracking changes in the virus that causes COVID-19.
Different types of flu can be transmitted from person to person making you ill or just sick so you cant go to school or work. If its a cough and its really bad doctors give antibiotics to bring the yellow stuff what’s stuck in your lungs out. Virus can also come from animals and flu like symptom’s which can also transfer to people what may kill them.
