Residents in the country's latest Covid-19 hotspot are reverting to social distancing and wearing masks.

People have swamped the Greenhithe barber in West Auckland for a trim fearing they won't get a chance if the area is forced into lockdown, and a popular bakery is preventing people from coming inside after an infected man spent more than three hours at a popular local tavern last Friday night.

The Malt was forced to shut its doors last night and health authorities urge staff and patrons to have a Covid test as soon as possible.

The bakery shop next to The Malt where the port worker enjoyed a night out drinking unaware he was harbouring the contagious virus, was today serving customers from a distance in a scene reminiscent of level 3 Auckland.

A Greenhithe bakery reverts to Level 3 safety protocols after a Covid-infected person spent last Friday night at a neighbouring tavern. (Photo / Sylvie Whinray)

Baked@Greenhithe's Mere Valentine said the bakery was not allowing customers in, instead placing a temporary counter at the front door and taking phone and text orders.

"It's just a precaution for the next couple of days. No customers in the store maybe for today and tomorrow," said Valentine.

After learning about the community transmission last night the bakery's owner had decided to change for the benefit of the workers and the community.

Although fewer customers were out and about this morning, many had returned voluntarily to using personal protection in public.

"Some are wearing masks," she said.

The Barbers Chair, which is in the same block of shops, said it was also taking extra personal protection measures for the next few days.

"We've got masks on," said one of the barbers. "We'll see how it goes, day by day."

He said people made a beeline for the haircutting business, having learned from previous shifts up the levels.

"There was a busy rush first thing this morning. I think people just wanted to get in, in case there was a lockdown," said the barber.

A staff member at the Greenhithe Village Store said locals had appeared to have stepped up their own personal health protection measures.

"More people are proactively staying clear of each other today, standing two metres apart and putting their masks on," he said.

Local schools were also on edge with parents being told to keep their children at home if they had flu-like symptoms or had come in contact with anyone at the tavern on Friday night.

Greenhithe School - a two-minute drive from the pub - issued a notice on its website early this morning, saying it had been in touch with the Ministry of Education.

Hobsonville Point Primary School told parents that if anyone in their household was at The Malt on Friday, or had been in touch with anyone who had been, they needed to let the school know.

Greenhithe principal Stephen Grady said: "As a school, we always take the care and health of our children very seriously.

"If your child is sick or showing any signs of the symptoms of Covid-19 (runny nose, cough, loss of smell etc), please keep your child at home and seek medical advice.