One woman shouting “my child is not a lab rat”.
And as they move between facilities, so can disease.
One of the organisers has been jailed for a minimum of three months.
Police were patrolling the Brisbane crowd.
Sydney's first legal protest after a months-long COVID-19 lockdown saw about 1,000 people march in support of global action day for climate justice, a worldwide movement mobilised during the COP26 meeting.
A spokesperson addressed the crowd and instructed attendees not to speak to media.