He recently became eligible to receive his Covid-19 vaccine.

And Dylan Alcott used the opportunity to hilariously troll anti-vaxxers opposed to the vaccine in an Instagram post on Tuesday.

In a caption accompanying a photo of him receiving his jab, the paraplegic athlete, 30, quipped: 'For all the anti-vaxxers, I can actually now walk. Do recommend.'

His joke was in reference to how anti-vaxxers lie or exaggerate about the side effects of vaccinations in order to promote non-scientific 'alternatives'.

He also wrote: 'Feel extremely lucky to receive my first dose of the Covid vax today, as I fall in the 1b rollout due to my disability.

'Special mention to all the frontline workers who have been busting their backside the past 12 months (and all other times too tbh) to keep us safe.'

The French Open champion gave a thumbs-up as a nurse gave him his shot.

Australia has hit the half a million milestone for Covid-19 vaccinations but is way short of the four million jabs the government planned to be by now.

About 507,000 Australians are vaccinated as of Friday - 329,000 in state and territory clinics, 97,000 by GPs, and more than 80,000 in aged care homes.

'Our GPs have played a vital role in this expansion and have not only been vaccinating over the week, but many practices are continuing to vaccinate on Saturday and Sunday this weekend,' Mr Hunt said in a statement.

However, the government's celebration ignores the fact 500,000 doses is just an eighth of its target for the end of March.

Every adult Australian is supposed to have at least one dose of the vaccine by late October but the sluggish start to the program puts this in doubt.

The government blames it on Australia's overseas vaccine supply being hit by Europe's decision to block some shipments of the AstraZeneca jab.