RESEARCH SAYS PFIZER/BIONTECH VACCINES GIVES THE LONGEST IMMUNITY

New research suggests the protection the Moderna vaccine gives against COVID-19 lasts for at least six months. The report Tuesday in the New England Journal of Medicine echoes what Pfizer said last week about its vaccine, which works in a similar way. People given the Moderna vaccine still have antibodies capable of neutralising the coronavirus six months after their second shot, a study has shown. All three vaccines used in the UK also appear to provoke long-term T-cell responses.

it is effective at preventing serious symptoms and death at least six months after vaccination, and effective against variants. Like a flu shot. There’s no data beyond six months because the COVID vaccines have only been around for six months. Eventually it could be once a year or however long the immunity truly lasts. I am not stating any of this as fact,  they are just informations based on life experience and reading.

Also, the Vaccine is 100% effective in preventing severe disease based on CDC definition and 95.3% effective based on FDA definition, vaccine 100% effective in preventing cases in Africa and developing countries but unfortunately so, it's not available for countries in Africa and developing countries as a whole. The controversial AstraZeneca vaccines is the most available vaccines for African countries right now, despite huge criticism surrounding the AstraZeneca model, it's the most commonly accessible for African nations.