A program to vaccinate children in the United States has come closer to reality, after the CDC endorseds the use of COVID-19 shots in kids from 5 to 11.

Australian health authorities and regulators have yet to decide if it should happen here, but it is expected to happen in the next couple of months.

There has been some debate about whether kids should be vaccinated, with some questioning the very small risks versus the rewards.

So on today's Coronacast, what do we know about health problems in children from the vaccine compared to getting COVID-19 itself?

Also on today's show:

* More on rapid antigen tests

* A new COVID treatment?

The rules for fully vaccinated people in NSW are changing for the better next week, with a bunch of restrictions being lifted early thanks to high vaccination rates.

But the unvaccinated will have to wait with restrictions longer, as the state aims for even higher levels of vaccination across the population.

NSW, Victoria and the ACT are showing that it's possible to get to 95 per cent 12+ vaccination, which is resulting in case numbers falling.

So on today's Coronacast, at the rate we're going, when might we run out of arms to stick needles into?

Also on today's show:

* More on finding which rapid-antigen test is best

* If we vaccinated everyone in the world, would SARS-CoV-2 die off?

It was in early May when the Delta variant was officially listed as a variant of concern.

Delta turned out to be far more contagious than previous variants, and challenged Australia's public health response.

But since then, there haven't been any new variants of concern listed by the World Health Organisation, though there have been a couple of new variants of interest.

So why not? And what do we know about the AY4.2 variant that's causing some concern in the UK?

Also on today's show:

* Should I go overseas on holiday?

* My friends believe that the only benefit of being vaccinated to prevent oneself from severe disease. Is this true?

From today, you can buy rapid antigen tests from the shop and use them on yourself to see if you've got COVID-19 or not.

Previously, the home, general-public use of antigen tests wasn't available for purchase by the general public.

So with a bunch of them on the market for the first time, what should you keep in mind and how do they differ from the usual PCR test we're so used to?

That's on today's Coronacast.

GUEST:

Dr Ian Norton, Managing Director, Respond Global

Australians over 18 years of age who've waited six months from their second COVID vaccine will be given the chance to grab a booster shot if they want one.

While the focus will be on aged care and healthcare workers to start, yesterday, the expert panel on vaccinations approved the use of Pfizer booster doses.

And - at the moment - it's being sold as a boost, not a requirement to be considered "fully vaccinated"

So on today's Coronacast, how did ATAGI come to its recommendation and what can we expect in the months ahead?

Also on today's show:

* Only Pfizer is approved at the moment, but I want Moderna. Should I wait?

* What about mixing vaccines?

* Is Norman back at the gym?

Australia's expert vaccination panel may soon tick off on a major expansion to the country's coronavirus vaccination program, paving the way for third doses to be administered.

Yesterday, the medicines regulator the TGA approved Pfizer for use as a third dose - sometimes referred to as a booster - for Australians aged 18 or over after six months after their second dose.

But despite the third dose boosting immunity, the Federal Government says they won't require it to be considered fully vaccinated.

Also on today's show:

* How does the TGA and ATAGI work in approving and recommending vaccines?

* Why only 18 years or over?

* Can I go get it a bit early?

* What about side effects?

One of the big unknowns with coronavirus is why some people are left with symptoms from the illness long after they test negative.

It's known as long COVID, and studies overseas suggest it affects more than half of people who get COVID to varying degrees of severity.

So now we're nearly two years into the coronavirus pandemic, have we learnt more about long-COVID and what type of symptoms seem to be most common?

And because Australia has been fortunate enough to get to high levels of vaccination before massive outbreaks, are we likely to avoid the worst of it?

Also on today's show:

* Is Norman at odds with Australia's chief medical officer on vaccines waning?

* Some of my friends in WA are hesitant to get the vaccine and anti-mandate. What do I do?

As more states open their borders in coming months, more COVID than ever will be circulating through the community.

Vaccines will help protect many of us, but for vulnerable people - like the elderly or immunocompromised - additional protections may be needed.

So if you have someone close that is more vulnerable to severe disease from a COVID-19 infection, what are some of the things you can do to help reduce the risk?

Also on today's show:

* 2nd generation vaccines vs natural immunity

* Will my pets need to be vaccinated too?

* Are there/will there be any plant based COVID vaccines?

* A study on fertility and the AstraZeneca vaccine (no problems found)

As more and more of the country is vaccinated, state and territory governments are starting to outline which restrictions we will lose when we reach very high levels of coverage.

Over the weekend, Victoria revealed that when it reaches 90 per cent double dose in a month there will be no density caps, and masks will only be mandatory at certain high-risk settings.

But how do we know when is the right time to lift restrictions and what can we learn from countries that have been this way before?

Also on today's show:

* Surgical masks give me "mascne" so I was going to invest in some 100 per cent silk reusable masks that are less likely to cause breakouts. They have a cotton interior but do you think they'd be effective enough against Delta?

* When a zero-COVID state opens up with hopefully high vaccination rates, will it be more vulnerable because there is no natural immunity in the community from infections?