How do vaccines produce immunity?
Vaccines offer both short and long-term protection or ‘immunity’ against infectious diseases.
In the days and weeks following vaccination, there is an initial surge in immune cells and antibodies that act as the ‘frontline fighters’ against a foreign invader in the body, such as a virus.1 Over time, these ‘frontline fighters’ naturally fade or wane, but they don’t reduce to zero.1 This is normal, expected and happens with all vaccines.1
Following this initial response, the immune system is still primed to ‘protect’, with longer-lasting ‘memory’ B and T-cells remaining in the body – ready to produce antibodies and defend against the disease if it’s later encountered.
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