that a single dose of Comirnaty's vaccine protects only modestly against infection and mild Covid, especially with the highly infectious Delta variant, but that it still works quite well in protecting against severe disease. Two doses, however, provide the best immunity as the second one reinforces the body’s immune response.The J&J vaccine requires only one dose. If you receive this vaccine, you are considered fully vaccinated two weeks after your shot.
“If you had a past infection and get a single dose of the vaccine, you'll get a tremendous immune response,” he said but added that this comes at a cost. Madhi also previously explained that natural infection induces a less predictable antibody response compared to vaccination. Natural immunity may also vary from person to person.Local experts have stated that South Africa is likely to experience a fourth wave of Covid cases as early as December 2021, although its severity cannot be predicted.
“Vaccines do work. They are effective. It will happen that vaccinated individuals end up in the hospital wards, but not to the same extent as individuals who are unvaccinated,” said Puren. Madhi also expressed concern about the low vaccine uptake among the older age groups, who are at greatest risk of Covid-related severe illness or death.
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