How much vaccines protect us It is the point where we are. Y Johnson & Johnson’s Janssen Vaccine, has confirmed that, for at least 8 months, whoever has received the dose is protected. And against all strains.
According to Janssen, a single dose of the Johnson & Johnson vaccine against covid-19 generated neutralizing antibodies against the different variants of the SARS-CoV-2 that we know, including the Delta variant that is becoming more prevalent and much more transmissible (B.1,617.2); the variant (B.1,351), the Gamma (P.1) and Alpha (B.1,1.7), Epsilon (B.1,429), Kappa (B.1,617. 1) variants and the D614G variants, as well as the strain original SARS-CoV-2, as confirmed by the company a few days ago.
Additionally, according to research by Dr. Dan Barouch of Beth Israel Deaconess Medical Center and Harvard Medical School conducted on 20 volunteers, the data showed that T cell responses, including CD8 + T cells that seek out and destroy infected cells, persisted over the eight-month period.
Will a second dose be necessary?
The company has done studies, and shares those of other researchers around the world, to find out how to deal with immunity. At the moment, everything seems to indicate that there will be no second dose, but as immunity studies go hand in hand with the time of the pandemic, and with the appearance of new variants, everything is under development.
That’s why Johnson & Johnson, in conjunction with the U.S. National Institutes of Health, is testing to see if giving two doses of your vaccine will provide better protection to citizens, not only to those vaccinated with a dose, but also to those who have had the disease and are vaccinated months later.
For Mathai Mammen, Global Director, Research and Development at Janssen, “current data from the eight months studied so far show that the Johnson & Johnson single-dose COVID-19 vaccine generates a strong neutralizing antibody response that does not diminish; rather, we see an improvement over time. Furthermore, we observed a persistent and particularly robust and long-lasting cellular immune response ”.
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