Influenza virus: Influenza is caused by several closely

Influenza is caused by several closely related viruses in the family Orthomyxoviridae, an RNA virus group. Influenza viruses are categorized as types A, B, C, and D. These major types generally produce similar symptoms but are unrelated antigenically. The infection with one type confers no immunity against the others. Influenza in India: What You Need to Know Every year, there are outbreaks of influenza in India, particularly during the winter months. Influenza viruses are constantly evolving, and new strains emerge every year. In India, the most common strains of influenza viruses that have been identified include influenza A (H1N1), influenza A (H3N2), and influenza B viruses . What is Influenza ? Influenza is a type of viral infection that is highly contagious and affects the respiratory system ... Flu, also called influenza, is an infection of the nose, throat and lungs , which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting. Most people with the flu get better on their own. Influenza ( flu ) and COVID-19 are both contagious respiratory infections that affect the respiratory system, but different viruses cause them. COVID-19 is caused by the coronavirus, first identified in 2019, while the flu is caused by influenza viruses .