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  jitender yadav

  Aug 7, 2024, 9:30:11 AM | Share

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  The time it takes for COVID-19 vaccines to start working can vary slightly depending on the specific vaccine. However, most vaccines generally follow a similar timeline for building up immunity. Here’s an overview for some of the commonly used COVID-19 vaccines:

  mRNA Vaccines (Pfizer-BioNTech and Moderna)

  • Pfizer-BioNTech:
    • First Dose: Some protection starts to build after about 12 days.
    • Second Dose: Given 21 days after the first dose. Full protection is usually achieved about 7-14 days after the second dose.
  • Moderna:
    • First Dose: Some protection starts to build after about 14 days.
    • Second Dose: Given 28 days after the first dose. Full protection is usually achieved about 14 days after the second dose.

  Viral Vector Vaccines (Johnson & Johnson's Janssen and AstraZeneca)

  • Johnson & Johnson's Janssen:
    • This is a single-dose vaccine. Some protection starts to build after about 14 days, with full protection typically achieved about 28 days after the single dose.
  • AstraZeneca:
    • First Dose: Some protection starts to build after about 14 days.
    • Second Dose: Given 4 to 12 weeks after the first dose. Full protection is usually achieved about 14 days after the second dose.

  Protein Subunit Vaccines (Novavax)

  • Novavax:
    • First Dose: Some protection starts to build after about 14 days.
    • Second Dose: Given 21 days after the first dose. Full protection is usually achieved about 14 days after the second dose.

  General Notes

  • Immune Response: The immune system starts building protection soon after vaccination, but it takes a couple of weeks after the final dose to achieve full efficacy.
  • Booster Doses: For many vaccines, booster doses are recommended to maintain or enhance immunity over time, especially in response to new variants.

  It's important to note that even after being fully vaccinated, it is recommended to continue following public health guidelines, such as wearing masks and practicing social distancing, especially in areas with high transmission rates or where new variants are spreading.

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