Anyone who was on bus route 22N from central Auckland to Avondale on August 12 is being urged to contact health authorities after two people with Covid-19 rode on the bus.
The two passengers, one of whom is believed to have caught the virus from the other, took the bus from Symonds St Overbridge (Stop 7162) to Avondale (Stop 8200) between 10.30am and 1.04pm on August 12, the day Auckland went into level 3 lockdown.
Auckland Regional Public Health Service (ARPHS) says there were 16 other passengers who travelled the same route, plus the driver.
"Of those people, ARPHS has identified 11 as close contacts. Nine of these people are being contacted by the National Investigation and Tracing Centre with advice on self-isolation and testing."
The remaining two people did not use registered AT Hop cards.