Two women from a Sydney mothers' group have been taken to hospital after a group argument about coronavirus escalated into a violent brawl.

The argument began between two women on a Sydney mothers' group chat site about the coronavirus and its effects.

According to Northern Beaches Police, the women, both aged in their 30s decided to "resolve their issues in person".

Emergency ambulance leaving the Royal Prince Alfred Hospital in Sydney on January 15, 2020. (Isabella Poras)

One woman reportedly brought another member of the mothers' group for back-up.

The argument allegedly escalated from verbal to physical abuse involving pushing, slapping and hair pulling.

The violence became so extreme that both women ended up on the ground and briefly unconscious, despite the efforts of bystanders to intervene.

The two women were taken to hospital, one needing a scan for a possible brain injury and the other x-rays for a shoulder injury as well as treatment for cuts, bruising and swelling to her arms, upper body and neck.