Even if you feel just fine, you’re likely to be well protected

Photo: Dayne Topkin/Unsplash


After receiving a Covid-19 vaccine, many people may experience minor adverse effects such as fatigue or headaches, which generally last around 24 to 48 hours. These reactions can be a sign that the immune system is working and responding to the vaccine. But what does this say about (or to) people who do not experience any side effects? Does an absence of adverse effects mean the vaccine did not work?

Because adverse reactions to the vaccine are more likely to be reported, some people who have not experienced side effects may be worried that they are not as protected as…