If you experience gastrointestinal symptoms like vomiting or diarrhea, they will be bad today as well. 6 Your sore throat, body aches, and congestion will be severe. This is the day when many symptoms are the most intense. As such, it is possible to undergo vaccination and still get an uncommon strain of influenza if that strain happens to be circulating.Ĭertain people are at increased risk of contracting the flu or developing complications. The third day is often the worst flu stage. Importantly, a flu vaccine will only be effective against the specific subtypes and combinations of viruses that it contains. The vaccine allows the immune system to identify the viruses and make antibodies that will be capable of fighting an active form of those viruses in the future. Flu vaccinesįlu vaccines contain dead or inactive forms of the three or four flu viruses that scientists predict will be circulating in the upcoming flu season. There are also other measures that people can take to avoid contracting and passing on the flu. The most effective way of preventing the flu is to receive a yearly flu vaccine. Nonetheless, it is possible to reduce the risk of flu. The flu is a common illness that most people will experience in their lifetime. To develop effective flu vaccines, scientists must predict which combinations will be circulating during a given year. Many different possible combinations of influenza types and subtypes can occur each year. The Maryland-based drugmaker on Tuesday also unveiled promising early data for its COVID and flu combination vaccine. Scientists further categorize influenza A viruses into subtypes, depending on the genes that make up the proteins on their surface. Together, they are responsible for the seasonal flu epidemics that occur year after year. According to the Centers for Disease Control and Prevention (CDC), the ones that routinely spread between people are influenza A and influenza B. There are four main types of influenza virus: A, B, C, and D. This system consists of the lungs, the airways, and the muscles necessary for breathing.Ī person develops flu as a result of contracting an influenza virus. Influenza is a common and highly contagious illness that mainly affects the respiratory system. Share on Pinterest After contracting the flu virus, a person may not experience symptoms for a number of days.
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