It's OK to wait longer than three weeks between Pfizer doses, and this may even provide stronger protection. But this must be weighed against the risk of contracting COVID in the meantime.
One of this and one of that might be a good strategy to coronavirus vaccination.
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Various companies use different ingredients and different delivery systems in their COVID-19 vaccines. Researchers are investigating whether it's better for individuals to mix what's available.
Even if we came up with a definition of what makes the "best" vaccine, we don't have the luxury of choice, when vaccines are in short supply.
Community pharmacies and pharmacists are important resources in Australia's vaccine rollout, and right now they're being under-utilised.
Corporations need to weigh up significant risks against wider benefits.
Australia is now rolling out the Pfizer vaccine to people aged under 50, with the 40-49 age group newly eligible. Here's what you can expect.
Both the AstraZeneca and Pfizer vaccines still work relatively well against it — though only after the second dose.
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Many developed countries have approved the use of the Pfizer vaccine in children as young as 12, even though they are a low-risk group.
Pharmacist Barbara Violo arranges all the empty vials of the AstraZeneca COVID-19 vaccine that she has provided to customers at an independent pharmacy in Toronto.
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Hundreds of thousands of Canadians got a shot of AstraZeneca's COVID-19 vaccine for their first dose. They now have a choice for their second dose: AstraZeneca again, or Pfizer or Moderna mRNA vaccine?
The infection of a Victorian aged-worker who had received their first COVID vaccine dose isn't completely surprising. We need two doses for optimal protection.
One study found antibody levels were significantly higher in people who received one dose of AstraZeneca then a Pfizer booster dose.
We want to get everybody vaccinated. Opening up to younger age groups could be one way to speed things up — but it will come with logistical challenges too.
The increased infectiousness of B16172 could magnify the impact of vaccines being less effective against it.
Many over 50s seem to be asking this question. But there are a number of reasons it's important to go ahead and get the AstraZeneca vaccine now.
Houses in the city of Victoria, the capital of Seychelles.
What does the Seychelles experience tell us about variants, vaccine efficacy and herd immunity?
The United States and Canada have approved the Pfizer vaccine for adolescents aged 12–15. The evidence so far tells us it works well and is safe for this age group.
Research has shown that vaccines have reduced infections, disease and hospitalisations – but will they continue to do so in the face of new variants?
Vaccination is one way we can help get kids back to in-person activities.
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The Pfizer COVID-19 vaccine was recently approved for adolescents ages 12-15. Vaccination is essential to protect children from serious illness and quicken return to normal life.
A vaccine expert breaks down everything you need to know about Australia's newest COVID-19 vaccine candidate.
You only have to prevent one case, which could have otherwise led to community spread and lockdown, for such a scheme to pay for itself many times over.