Yahoo Web Search

  1. Ad

    related to: pfizer vaccine side effects blood clot
  2. 65 And Older & Got A 2023-24 COVID-19 Shot? You May Be Eligible For An Additional Dose. Use The Vaccine Finder To Find COVID-19 Vax Locations Near You & Help Stay Protected.

Search results

  1. Feb 27, 2024 · A study published Feb. 12 in the journal Vaccine reported on an international group of more than 99 million people who received COVID-19 vaccines, primarily finding links to known rare side effects.

  2. Sep 16, 2022 · Blood clotting is a well-recognized complication of SARS-CoV-2 infection. It has also been identified as an extremely rare side effect of certain COVID-19 vaccines. The risk with vaccines is exceedingly low and individuals are at a significantly higher risk of developing a blood clot from COVID-19 infection than following COVID-19 vaccination.

    • Overview
    • Rollout of vaccination program
    • Increased risk of rare blood clots
    • The second study
    • Extremely rare event

    •Two large studies have found a small increase in the absolute risk of rare types of blood clot in the head following a first dose of the AstraZeneca COVID-19 vaccine.

    •An increased risk of a type called intracranial venous thrombosis only applied to individuals under 70 years of age.

    •The benefits of vaccination to protect against severe COVID-19 far outweigh the risks that the researchers identified.

    •They found no evidence of increased risks following a first dose of the Pfizer-BioNTech COVID-19 vaccine.

    In the U.K., a vaccination program that employed the Pfizer-BioNTech vaccine began on December 8, 2020, with the AstraZeneca vaccine added on January 4, 2021.

    The program prioritized extremely clinically vulnerable individuals and those over 70 years, followed by people with chronic illnesses, such as diabetes and high blood pressure, and those over 65 years.

    In the first study, researchers led by Dr. Whiteley analyzed the electronic health records of 46 million adults in England, 21 million of whom had their first vaccine dose between December 2020 and March 2021.

    Overall, 79% of the participants were white, 51% female, and 84% under 70 years.

    The researchers compared the incidence of thromboses before and after the first dose of vaccine. They then adjusted the figures to account for other factors that might affect the incidence of blood clots, including age, sex, ethnicity, socioeconomic status, existing medical conditions, and medications.

    After adjustments, the overall risk of thromboses was lower in the 28 days after the first dose of either the AstraZeneca or Pfizer-BioNTech vaccine, compared with before vaccination.

    In people under 70 years of age, the rates of intracranial venous thromboses — blood clots in a vein in the head — or hospitalization with low platelet levels were roughly twice as high in the 28 days after a first dose of the AstraZeneca vaccine.

    However, because these events are extremely rare, the absolute increase in the number of events was very small.

    The scientists estimate that after adjustments for other risk factors, the AstraZeneca vaccine may cause between 0.9 and 3 extra cases, depending on age and sex, for every million people vaccinated.

    This small increase in risk is easily offset by the reduced risk of becoming sick or dying from COVID-19 that the vaccine provides.

    “Most people want accurate information about the pros and cons of the treatments that they take, and we are providing information for them,” said Dr. Whiteley.

    “The overwhelming majority of people in the U.K. decide to be vaccinated against COVID-19 when offered a vaccine, and because of this COVID-19 is less of a threat to us all,” he added.

    In the second study, scientists led by the University of Edinburgh in the U.K. investigated the incidence of a rare type of blood clot in the brain called cerebral venous sinus thrombosis (CVST).

    In 2021, several countries withdrew the AstraZeneca vaccine or restricted its use to older people following initial reports of a possible link between the vaccine and CVST.

    The background incidence of CVST is only 3 to 4 per million person-years in adults, but the chances of dying for someone with a CVST is around 4%.

    Dr. Steven Kerr, Ph.D., a senior data scientist at the University of Edinburgh, and his colleagues linked electronic medical information from primary care and secondary care, plus mortality and virological test data.

    The study encompassed data from more than 11 million people in England, Scotland, and Wales who received their first dose of a COVID-19 vaccine from December 2020 through June 2021.

    The researchers compared the rate of CVST events for individuals during a 90-day period before their vaccination with the 4 weeks afterward.

    “It is important to understand that CVST is an extremely rare event, which typically only occurs a handful of times per million people per year,” Dr. Kerr told MNT.

    “This should be weighed up against the risk associated with contracting COVID and the level and duration of protection that vaccines offer,” he said.

    He added that the relative increase in the risk of CVST following a first dose of the AstraZeneca vaccine may be higher in young people than in older people.

    “This is something we may be able to study in the future as we amass data that covers a longer time period,” he added.

  3. A study published by The BMJ today sheds further light on the risk of developing a very rare blood-clotting condition known as thrombosis with thrombocytopenia syndrome (TTS) after vaccination against the covid-19 virus. Based on health data from five European countries and the US, it shows a small increased risk of TTS after a first dose of ...

  4. Feb 26, 2024 · The largest vaccine safety study to date has identified two new, but very rare, side effects associated with covid-19 vaccines—transverse myelitis and acute disseminated encephalomyelitis. The Global Vaccine Data Network cohort study included 99 million vaccinated people from 10 sites across eight countries. Researchers compared the observed with expected rate for 13 neurological, blood, and ...

  5. Jan 20, 2023 · Question: Are blood clots and/or heart problems potential side effects of the COVID-19 vaccines? Answer from infectious diseases expert James Lawler, MD:. Multiple studies and data from vaccine safety monitoring systems show the COVID-19 vaccines are as safe as other routine vaccines.

  6. Apr 14, 2021 · Still, he said there were 35 cases of serious blood clots with the vaccine made by Pfizer/BioNTech among 54 million doses given; five cases with the Moderna vaccine among 4 million Europeans dosed ...

  1. Ad

    related to: pfizer vaccine side effects blood clot
  2. 65 And Older & Got A 2023-24 COVID-19 Shot? You May Be Eligible For An Additional Dose. Use The Vaccine Finder To Find COVID-19 Vax Locations Near You & Help Stay Protected.

  1. People also search for