Parents and carers are urged to keep young children at home if
they are sick amid a rapid rise in outbreaks of viral gastroenteritis
in Victoria.
Viral gastroenteritis is highly infectious. Symptoms include
nausea, vomiting, diarrhoea, fever, abdominal pain, headache
and muscle aches, with more severe outcomes in the elderly and
very young. Symptoms can take up to three days to develop and
usually last between one or two days, sometimes longer.
Washing hands with soap and water is one of the most effective
ways of preventing the spread of infection. Alcohol-based hand
sanitisers are not effective against many common viruses that
cause gastroenteritis.
Infants or children in childcare or school, as well as staff, who
develop vomiting or diarrhoea should stay at home until at
least 48 hours after their symptoms have stopped, since they will
still be infectious. If symptoms are severe or they persist, or you
are concerned, see a GP for advice and possible testing.

Please find below information found on the Victorian Government Health Department site.