Flu shot

Flu Shot

A flu shot, also known as an influenza vaccine, is a vaccine that protects against the influenza virus. The flu shot is typically administered annually to help prevent the spread of influenza, which can cause severe illness and complications, especially in vulnerable populations such as the elderly, young children, and individuals with compromised immune systems.

Types of Flu Vaccines

There are several types of flu vaccines available, including:

• Inactivated Influenza Vaccine (IIV): This vaccine contains killed virus and is administered via injection.
• Live Attenuated Influenza Vaccine (LAIV): This vaccine contains a weakened form of the virus and is administered as a nasal spray.
• Recombinant Influenza Vaccine (RIV): This vaccine is produced using recombinant DNA technology and does not use the influenza virus or eggs in its production.

Effectiveness

The effectiveness of the flu shot can vary from year to year, depending on how well the vaccine matches the circulating strains of the influenza virus. The World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC) monitor flu activity and make recommendations for the composition of the flu vaccine each year.

Side Effects

Common side effects of the flu shot include:

• Soreness, redness, or swelling at the injection site
• Low-grade fever
• Muscle aches

Severe allergic reactions are rare but can occur. Individuals with a history of severe allergic reactions to any component of the flu vaccine should consult their healthcare provider before receiving the vaccine.

Recommendations

The CDC recommends that everyone aged six months and older receive an annual flu shot, with rare exceptions. Specific recommendations are made for different age groups and populations, including:

• Children
• Pregnant women
• Elderly individuals
• Individuals with chronic health conditions

History

The development of the flu vaccine began in the 1930s, with the first licensed flu vaccine being introduced in the 1940s. Since then, advancements in vaccine technology and production have improved the safety and effectiveness of flu vaccines.

See Also

• Influenza
• Vaccine
• Centers for Disease Control and Prevention
• World Health Organization
• Public health

Related Pages

• Influenza
• Vaccine
• Centers for Disease Control and Prevention
• World Health Organization
• Public health