Dr Tim Baker, director of the Centre for Rural Medicine, said the point of the lockdown was to keep people apart.

"Having lots of people together has to increase the risk that the infection will spread and we won't get out of lockdown as quickly," Dr Baker said.

He said it was good when people took an interest in medications and vaccinations, but the community should be reassured that expert working groups were delivering up-to-date information on COVID-19 vaccinations.

"You certainly don't want to get COVID - not even when you're a young person."

Former Victorian Premier Denis Napthine has urged states across Australia to unite in the fight against the pandemic.

"Let's stop the blame game, let's look at the solution game, let's look at the vaccination game," Dr Napthine said.

He said he was disappointed people decided to flout the law and attend the rallies in Melbourne and Sydney.

"Across the world Australia and New Zealand have been held up as the countries who have handled this pandemic the best. Now we're putting on a very poor show with how we deal with the outbreaks that we knew were inevitable.

"COVID doesn't know anything about politics, so you can't solve it with politics.

"I'm very disappointed the states are acting as islands rather than working together as a nation."

Member for South West Coast Roma Britnell said while she understood people were frustrated about the lockdown, it was incredibly disappointing to see people breaking the law.

She encouraged community members to get vaccinated.

"The Delta variant has changed things significantly," she said.

"Gatherings are too risky at the moment."