Vaxzevria (AstraZeneca COVID-19 vaccine) (COVID-19 Vaccine (ChAdOx1-S [recombinant])) — Uses, Dosage, Side Effects & Safety

Drug class: Vaccine (Viral Vector, Non-Replicating)

Overview

Vaxzevria is a vaccine used to help protect against COVID-19, the disease caused by the SARS-CoV-2 virus. It is designed for adults and adolescents aged 18 years and older. The vaccine works by stimulating your immune system to produce antibodies and immune cells that can recognize and fight the coronavirus if you are exposed in the future. Vaxzevria uses a harmless, modified adenovirus (a type of cold virus) to deliver genetic instructions for making the spike protein found on the surface of the coronavirus. Your body then builds immunity by recognizing this protein as foreign and preparing defenses against it. Key points: Vaxzevria does not contain live coronavirus, cannot cause COVID-19, and is given as an injection in the upper arm. It is important to complete the full vaccination schedule for optimal protection. Some people may experience mild side effects, such as soreness at the injection site or mild fever.

Therapeutic uses

  • Active immunization to prevent COVID-19 caused by SARS-CoV-2
  • Prevention of severe COVID-19 disease
  • Prevention of COVID-19-related hospitalization
  • Prevention of COVID-19-related death

Common side effects

  • Injection site pain
  • Headache
  • Fatigue
  • Muscle aches
  • Fever
  • Chills
  • Nausea
  • Thrombosis with thrombocytopenia syndrome (TTS)

Frequently Asked Questions about Vaxzevria (AstraZeneca COVID-19 vaccine)

How effective is Vaxzevria against COVID-19?

Clinical trials and real-world studies show Vaxzevria is effective at preventing symptomatic COVID-19 and severe disease, especially after two doses. Effectiveness may vary with different variants and over time.

Can Vaxzevria cause COVID-19?

No, Vaxzevria does not contain live coronavirus and cannot cause COVID-19.

What should I do if I have side effects after vaccination?

Most side effects are mild and resolve within a few days. Use acetaminophen (paracetamol) for fever or pain if needed. Seek medical attention for severe or persistent symptoms.

Is Vaxzevria safe during pregnancy or breastfeeding?

Current evidence suggests Vaxzevria can be considered during pregnancy or breastfeeding if the benefits outweigh the risks. Discuss with your healthcare provider.

Can I receive Vaxzevria if I have a history of blood clots?

Discuss your history with your healthcare provider. Vaxzevria is not recommended for people with a history of TTS after a COVID-19 vaccine. Other clotting disorders may require caution.

Do I need a booster dose after the initial series?

Booster recommendations vary by country and individual risk factors. Follow local health authority guidance.

How long does protection from Vaxzevria last?

Protection is highest after the full series and may decrease over time. Booster doses can help maintain immunity.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.