New Zealand's coronavirus lockdown will be managed by a leadership team of some of the country's top officials. That team is Dr Ashley Bloomfield, Director-General of Health, Sarah Stuart-Black, Director of Civil Defence Emergency Management, Mike Bush, Commissioner of Police, and Dr Peter Crabtree.
"I'm hoping the Ministry of Health will identify all of them, or encourage them to isolate and get tested."
Williams said he was aware last week that the man had been in contact with another confirmed case, as well as some Pakuranga College students, but that the advice at the time from the Ministry of Health was that the man's risk was low and that he didn't need to take any precautions.
"On Friday, we were looking at isolating our students because of that contact. We pulled back from that stick because of the Ministry of Health advice.
"In hindsight, their advice was exactly wrong. The young people should have been in isolation and they should have been tested."
Williams said the man was a hero for getting tested on his own initiative.
A Ministry of Health spokesperson said casual contacts of confirmed cases were not required to self-isolate unless symptoms developed, in which case they should be tested. "We understand that the man in this case did develop symptoms and was tested."
Earlier today, Director-General of Health Dr Ashley Bloomfield said authorities were tracing "any contacts" of the man.