How long does it take to build immunity after getting the COVID-19 vaccine??

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Coronavirus disease 2019 (COVID-19) is a contagious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was identified in Wuhan, China, in December 2019. The disease has since spread worldwide, leading to an ongoing pandemic.[1] Preventive measures include physical or social distancing, quarantining, ventilation of indoor spaces, covering coughs and sneezes, hand washing, and keeping unwashed hands away from the face, mouth , nose and eyes. The use of face masks or coverings has been recommended in public settings to minimise the risk of transmissions. Several vaccines have been developed and many countries have initiated mass vaccination campaigns.

How long does it take to have immunity after vaccination?

Pfizer and Moderna COVID-19 vaccines require 2 doses, Johnson & Johnson /Janssen vaccine requires only one. With all three vaccines, immunity builds over a few weeks after immunization. Data from Johnson & Johnson show that most vaccinated trial participants had a robust immune response 15 days after getting the shot, with significant protection reached by day 29.[2]

  1. Pfizer: 1 week after vaccination[3]
  2. Moderna: 2 week after vaccination[4]
  3. Johnson & Johnson: 29 days after vaccination[5]

You can find detailed COVID-19 vaccine information below.

How long does it take to build immunity after getting the COVID-19 vaccine?PFIZERMODERNAJOHNSON & JOHNSON / JANSSEN
Type of vaccinemRNAmRNAAdenovirus-based non-replicating viral vector
Overall efficacy for current variants95%94.10%72% in the USA
Time needed to build immunity7 days after vaccination14 days after vaccination29 days after vaccination
Protection from severe disease90%100%85%
Number of study subjects hospitalized from COVID-19000
Plans for variants if efficacy dropsBooster in developmentBooster in developmentBooster in development
Approved for ages16+18+18+
Number of required doses221
Dose intervals3 weeks apart (21 days)4 weeks apart (28 days)N/A
Storage information-25° to -15° C-25° to -15° C2° to 8° C
Pediatric approvalCurrently in trials (Trials fully enrolledCurrently in trials (Trials fully enrolled)Currently in trials
Pregnancy approvalDART complete, no adverse reactions, human trials openDART complete, no adverse reactions