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Over a year into the pandemic, questions around immune responses after COVID continue to confound. One question many people are asking is whether the immunity you get from contracting COVID and recovering is enough to protect you in the future. The answer is no, it’s not. Here’s why. Remind me, how does our immune response work? Immune responses are innate or acquired. Innate, or short-term immunity, occurs when immune cells that are the body’s first line of defence are activated against a pathogen like a virus or bacteria. If the pathogen is able to cross the first line of defence, T-cells and B-cells are triggered into action. B-cells fight through secreted proteins called antibodies, specific to each pathogen. T-cells can be categorised into helper T-cells and killer T-cells. Helper T-cells “help” B-cells in making antibodies. Killer T-cells directly kill infected cells.

Uttar pradeshInstitute of medical sciencesPublic health englandBanaras hindu universityHelpert cellsMemoryb cellsMolecular immunologyMedical sciencesBanaras hinduCreative commonsஉத்தர் பிரதேஷ்நிறுவனம் ஆஃப் மருத்துவ அறிவியல்பொது ஆரோக்கியம் இங்கிலாந்துபனாரஸ் இந்து பல்கலைக்கழகம்மூலக்கூறு நோயெதிர்ப்புமருத்துவ அறிவியல்