New Zealand will see the new variant of Covid-19 from the UK here within the next few weeks, a top epidemiologist warns.
But the new Covid-19 strain is potentially only a problem for New Zealand if the virus is imported and it starts an outbreak here, Professor Michael Baker said.
Top health officials in the UK say there is no evidence the new variant is more deadly, or will react differently to vaccines, but it was proving to be up to 70 per cent more transmissible, the BBC reports.
London and other parts of southeast England are now in lockdown.
The mutation has also been detected in the Netherlands, Denmark and Australia.
"This is probably not that surprising, that a strain like this would emerge because there is this evolutionary pressure on the virus, it's always got lots of variants floating around and if one is more infectious than others, it will create more viruses in the next generation and so on, so that strain becomes more dominant."
Baker said there were positive cases from the UK in last week's cases reported here.
"Basically every time we get an infected person going into a MIQ facility in New Zealand, it increases the risk of outbreaks because mistakes happen and it's a tough virus to control."
He said a simple measure is to add an extra step, an additional period of MIQ stay in the UK and having a negative test result before travelling.
"We will be bringing this virus into New Zealand now, or in the next few weeks, because it's becoming the dominant virus there."
Meanwhile in Australia, new Covid-19 restrictions have been implemented in Greater Sydney after an outbreak in the Northern Beaches.
The New Zealand government says it is monitoring the new Covid-19 cluster in Sydney closely but it is too early to say if it will affect a trans-Tasman bubble.
"What they're seeing is very much like what we saw in our Auckland August outbreak ... and this is a scenario that you don't want to see, where cases are appearing in the community with no link to the border. That always tells you that there's going to be other unseen cases out there..."
Baker says New Zealand and Australia are dealing with the virus in a similar manner, working on an strategy of elimination.
"I don't think this episode really changes the potential to have a link and eventually quarantine-free travel with Australia, we've just got to be very good at managing these things when they happen."
It will be months before there is enough vaccine coverage in Australia and New Zealand and we are able to limit transmission, he said.