A measles alert has been issued for the Sydney CBD, Artarmon and train and bus services after a woman affected by the virus visited the areas between April 29 and May 6. The woman had been travelling in Southeast Asia and her vaccination status is unknown. It takes the total number of measles cases in NSW up to more than 30 since Christmas.

On April 29 the woman caught a train from Town Hall station to Artarmon at around 1.30pm. Around 4.15am she caught the N90 bus back to Artarmon. The following day she made the same journeys, at approximately 1.30pm and 2.15am respectively. Again on May 1 she took a train from Town Hall to Artarmon at around 11.30am and the N90 back to Town Hall around 12.30am. On May 4 she caught the train from Town Hall to Artarmon around 9am and returned to Town Hall on the train at approximately 7.15pm.

On May 5 she visited the Purikura Games Centre at Capitol Square in Haymarket between 3pm and 5.30pm and the following day visited World Square shopping centre between 3pm and 6.30pm.

NSW Health is warning anyone who was in these areas or on public transport at these times to keep an eye out for symptoms until May 24. It can take 18 days for symptoms to appear following exposure to the airborne virus.

“Symptoms to watch out for include fever, sore eyes and a cough followed three or four days later by a red, spotty rash that spreads from the head to the rest of the body,” NSW Health’s director of communicable diseases Dr Vicky Sheppeard said in a statement.

Children under the age of 12 months, people with weakened immune systems (for example, from cancer therapy or high-dose steroid use) and pregnant people are encouraged to contact their local public health unit on 1300 066 055. Preventative injections can be administered up to six days after exposure for those highly susceptible to the contagion.

Visit NSW Health for more information.