In short
This article discusses two clinical trials investigating the use of influenza vaccines containing the Influenza A Virus, A/Cambodia/E0826360/2020 (H3N2) - Like Strain (A/Tasmania/503/2020, IVR-221), Inactivated. The first trial compares the effectiveness of high-dose and standard-dose quadrivalent influenza vaccines in older adults. The second trial examines the potential of influenza vaccination to preserve beta-cell function in early-stage type 1 diabetes patients. These studies aim to improve our understanding of influenza prevention and its potential impact on various health outcomes.
What is it?
INFLUENZA A VIRUS, A/CAMBODIA/E0826360/2020 (H3N2) - LIKE STRAIN (A/TASMANIA/503/2020, IVR-221), INACTIVATED is a component used in influenza vaccines. This is a specific strain of the influenza virus that has been inactivated (killed) so it cannot cause infection. It is designed to protect against a particular type of influenza A virus, specifically the H3N2 subtype.
How does it work?
When this inactivated virus strain is included in a vaccine, it helps your immune system recognize and fight against similar live viruses if you're exposed to them. The vaccine stimulates your body to produce antibodies against this specific strain of influenza, providing protection without causing the actual illness.
What is it used for?
This strain is used in vaccines to prevent influenza infection, particularly in older adults. Influenza, commonly known as the flu, is a respiratory illness that can cause severe complications, especially in vulnerable populations like the elderly.
Vaccines containing this strain
This strain is found in several influenza vaccines, including:
- Efluelda: A high-dose quadrivalent influenza vaccine for older adults.
- Vaxigriptetra: A standard-dose quadrivalent influenza vaccine.
- Vaxigrip Tetra: Another quadrivalent influenza vaccine.
These vaccines are typically given as an injection into the muscle (intramuscular injection).
Ongoing research
Current research is focusing on comparing the effectiveness of different vaccine formulations:
- A study is comparing high-dose quadrivalent influenza vaccine (QIV-HD) to standard-dose quadrivalent influenza vaccine (QIV-SD) in older adults. The main goal is to see if the high-dose vaccine is better at reducing hospitalizations due to influenza or pneumonia.
- Another study is investigating whether influenza vaccination can help preserve beta cell function in young patients with newly diagnosed type 1 diabetes.
Safety and effectiveness
The vaccines containing this strain are approved for use and considered safe for most people. However, as with any medical treatment, there are some considerations:
- People with severe allergies to eggs, chicken proteins, or previous allergic reactions to influenza vaccines should not receive these vaccines without consulting their doctor.
- The vaccines may not be suitable for people with certain medical conditions or those taking specific medications. Always consult with your healthcare provider before getting vaccinated.
- The effectiveness of the vaccine can vary from year to year, depending on how well the vaccine strains match the circulating viruses.
Remember, while this strain is an important component of influenza vaccines, it's just one part of a complex formula designed to protect against multiple strains of the flu virus. Always follow your healthcare provider's advice regarding vaccinations.