Further informationĪ blood clotting leaflet for patients receiving their first dose is available.įurther information is available on GOV. It is very important that all suspected cases are reported to both the MHRA on the COVID-19 Yellow Card scheme and to PHE’s clinical reporting scheme. In exceptional circumstances where this is not possible it is better to have a second dose of another vaccine than not at all. The WHO Strategic Advisory Group of Experts on Immunization (SAGE) has issued updated interim recommendations for the use of the Moderna COVID-19 (mRNA-1273) vaccine against COVID-19. It is recommended that you have both doses of the same vaccine. Espaol Updated 18 August 2022, to adhere to the latest SAGE recommendations. So even if you felt unwell after your dose of AZ vaccine, unless you had this rare clotting event, you are best to complete with this vaccine for your second dose. This will help us to understand the risk factors for developing this condition. The underlying risk factors have not yet been fully established for this condition and a detailed review of suspected cases is ongoing by the Medicines and Healthcare products Regulatory Agency ( MHRA), supported by Public Health England ( PHE) and other professional groups. For the second dose of vaccine, less than 1 case has been reported for every million vaccines given to people under 50 years of age none of these second-dose cases were confirmed. In under 50s, around 1 case has been reported for every 50,000 first doses of the AZ vaccine. Since March 2021 there have been reports from the UK and internationally of a very rare condition of thrombosis (blood clots) and thrombocytopenia (low platelets). This includes individuals who are aged 39 years or younger. Those who have received their first dose of AZ vaccine without suffering any serious side effects should continue to be offered the second dose to complete the course. The current advice from the Joint Committee on Vaccination and Immunisation ( JCVI) is: Most of these side effects only last a day or two and you still make a good immune response. Studies have shown that if you have 1 of these vaccines after a first dose of AZ, your risk of common side effects is higher. Pfizer and Moderna tend to cause more side effects after the second dose. The AstraZeneca ( AZ) vaccine causes far fewer side effects after the second dose.
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