A high level of participation helps create what is called 'herd immunity,' which is often necessary to safeguard those who don’t respond well to the vaccine
Several public-opinion polls have found that lots of people won’t be rolling up their sleeves to get a COVID-19 vaccine when it becomes available. But does it really matter if anti-vaxxers shun the shot? Let them get sick if they want to. At least those of us who are vaccinated will be protected.Unfortunately, it does matter. For a vaccine program to be effective against a common pathogen, a certain percentage of the population usually needs to be inoculated and able to resist infection.
To protect vulnerable populations, we need a sufficient number of people who are immune to the infection so that the virus has a hard time spreading from person to person. But Kozak says vaccine development can be accelerated without jeopardizing science or safety. He notes that researchers often spend a lot of time applying for grants.
Kozak does acknowledge that research is still a very lengthy process. It takes a fixed amount of time for the immune system to respond to a vaccine, and then it takes more time to do the tests that can confirm safety and effectiveness. “It’s all just an exercise in patience,” he adds.
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