aQIVc HD is a high-dose influenza vaccine designed to protect against four different strains of the flu virus. It is made using a process that involves growing the virus in cells, which can help produce a strong immune response. This vaccine also includes an ingredient called an adjuvant, which helps boost the body’s immune response to the vaccine, making it more effective, especially in older adults.

QIVr is a type of flu vaccine that also targets four different strains of the influenza virus. Unlike some other vaccines, it is made using recombinant technology, which means it is produced without using the actual flu virus. This method can be beneficial for people who have allergies to eggs, as it does not involve egg-based production. The vaccine is designed to help the immune system recognize and fight off the flu virus if exposed.

aQIV is another influenza vaccine that protects against four strains of the flu virus. It is made using a traditional method where the virus is grown in eggs. This vaccine also contains an adjuvant, which is an ingredient that enhances the immune response, making the vaccine more effective. It is particularly useful for older adults, who may need a stronger immune response to be protected against the flu.

Influenza – Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. It primarily affects the nose, throat, and sometimes the lungs. The disease typically begins suddenly and is characterized by symptoms such as fever, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, and fatigue. Influenza can lead to mild to severe illness and can sometimes result in complications, especially in certain high-risk groups. The virus spreads mainly through droplets made when people with the flu cough, sneeze, or talk. It can also spread by touching surfaces or objects that have the virus on them and then touching the mouth, nose, or eyes.