Scientists debate the medical benefits of booster shots. But there’s another aspect to consider: bioethics.
You’ll read lots of different figures on this — six months, eight months, more — and that’s because the research is ongoing. We don’t yet have a concrete answer.
Some countries have started administering third doses of COVID vaccines, or booster shots. But we’re still learning about how long immunity lasts from the first two shots.
A 2015 paper on chicken virus evolution is being taken out of context and used to fuel fears about COVID-19 vaccines. Its lead author aims to clarify the science in hopes of saving lives.
People with weakened immune systems are at a high risk of severe and prolonged COVID-19 infections. An extra vaccine dose can bolster protection.
There are two ways to look at it: self-interest versus altruism.
Though currently approved COVID-19 vaccines effectively provide immunity against the virus, it’s unclear how long that protection will last.
By the time Australia is ready to deliver Novavax, we may well have completed most of the vaccine rollout with AstraZeneca, Pfizer and Moderna. That doesn’t mean Novavax won’t play an important role.
An immunologist explains that you get some protection from the first dose of the mRNA vaccines but you need two to build up strong immunity, particularly to newer coronavirus variants.
Giving smaller vaccine doses in multiple shots is often more effective than a larger single dose.