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.
The TGA has reported a handful of cases of the autoimmune disorder Guillain-Barré syndrome following the AstraZeneca vaccine.
Many people are unsure if their condition qualifies as an underlying medical condition. They may not realise they're already eligible for the COVID vaccine.
A serious event such as a blood clot could be caused by an underlying medical condition, a medication the person was taking at the time, or some other factor unrelated to the vaccine.
Both the AstraZeneca and Johnson & Johnson vaccines are now being investigated for links to rare blood disorders.
Capillaries are the body’s smallest blood vessels, and allow oxygen, nutrients and waste products to be delivered and removed from tissues.
European regulators are investigating a possible link between the vaccine and a second rare blood disorder.
The challenge now is to address the understandable concerns and prevent them from contaminating the broader public dialogue on COVID-19 vaccination.
All vaccines and medications come with risks. But the risks of delaying vaccination are far higher.
Vaccine production staff demonstrate operations at a facility in Germany.
AP Photo/Michael Probst
Vaccine manufacturing is complex, with lots of potential points for errors. But it also has extensive quality control checks and approvals.
A sign shows the way to a recovery area to monitor any immediate side effects from the COVID-19 vaccine on Dec. 17, 2020, in Reno, Nevada.
Patrick T. Fallon /AFP via Getty Images
Many people never experience the least bit of discomfort from the COVID-19 vaccines, but mild side effects are common. They include swelling in the affected arm, nausea and chills.
New mRNA vaccines use genes from the coronavirus to produce immunity.
Andriy Onufriyenko/Moment via Getty Images
So far, most vaccines in the US are mRNA vaccines. These represent a new technology and are likely to take over the vaccine world. But how do they work? What are their weaknesses? Five experts explain.
An unidentified doctor talks with a boy who holds a lollipop reward after participating in a measles vaccine research program in Upper Darby, Pennsylvania, in 1963.
Vaccination has been controversial from its beginning. Gaining people's trust in vaccines has been crucial. An important part of that is a strong communications plan.
Years of vaccine research tells us that, if side effects are going to occur, they normally occur within the first months after getting a vaccine.
Ted S. Warren/AP/AAP
How will governments convince enough people to get vaccinated to achieve herd immunity?
Tamara Dus, director of University Health Network Safety Services, administers a Pfizer-BioNTech COVID-19 vaccine in Toronto.
THE CANADIAN PRESS/Frank Gunn
The arrival of COVID-19 vaccines has raised hope for an end to the pandemic. Hopefully that's true, but there are variables. Here are some factors that could affect the success of the vaccine rollout.
If too many Americans refuse to take the COVID-19 vaccine, achieving population immunity will be difficult.
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Two in five Americans say they don't want a COVID-19 vaccine, which is a problem. Finding out what Americans do want from a vaccine might help.
Francesca Passer, a registered pharmacist technician, carefully fills a syringe with the Pfizer-BioNTech COVID-19 mRNA vaccine at a vaccine clinic during the COVID-19 pandemic in Toronto on Dec. 15, 2020.
THE CANADIAN PRESS/Nathan Denette
Employers could require their workers to get vaccinated against COVID-19 via both workplace policies and existing laws. Neither option, however, is simple or straightforward.
There are three promising COVID-19 trials.
The drug maker company Pfizer says its COVID-19 vaccine is 95% effective with no serious side effects.
Eduardo Munoz Alvarez/VIEW press/Corbis News via Getty Images
The United Nations recently asked a group of experts across the world to recommend ways to persuade people to take a COVID-19 vaccine. Here is a summary of their suggestions.
Two more COVID-19 vaccines may now be on the cards for Australia, should they pass clinical trials. But, as with earlier vaccine deals, there are no guarantees.