WHO

His comments come as countries around the world battle to prevent the virus spreading further.

For a second day, more cases have been reported outside than inside China.

Iran and Italy have become major centres of infection, with people travelling from there spreading the virus further afield.

Several high-profile Iranian officials have become infected, the latest being Vice-President for Women and Family Affairs Masoumeh Ebtekar.

"It's what's happening in the rest of the world that's now our greatest concern," Dr Tedros said.

The WHO said it was too early to call the outbreak a pandemic but countries should be "in a phase of preparedness".

A pandemic is when an infectious disease spreads easily from person to person in many parts of the world.

More cases of the virus, which causes respiratory disease Covid-19, continue to emerge, with outbreaks in South Korea, Italy and Iran causing concern.

However, most infections are in China, the original source of the virus, where 77,000 people have the disease and nearly 2,600 have died. The number of new cases there is now falling.

Director-General Tedros Adhanom Ghebreyesus said the steps taken by China to fight the virus at its epicentre were the best way of stopping its spread.

Meanwhile, China's envoy to the UN in Geneva told nations not to over-react.

At least 427 people have died with more than 20,000 confirmed cases worldwide.

The WHO has declared a global health emergency over the outbreak but said the virus did not yet constitute a "pandemic" - the worldwide spread of a new disease. Officials say 425 people have died in China, one in Hong Kong and one in the Philippines.

Dr Mike Ryan praised China's response to the deadly outbreak, saying: "The challenge is great but the response has been massive."

The WHO will meet on Thursday to discuss whether the virus constitutes a global health emergency.

The Chinese city of Wuhan is the epicentre of the outbreak.

But the virus has spread across China and to at least 16 countries globally, including Thailand, France, the US and Australia.

More than 130 people have died in China and close to 6,000 have been infected.

They said this should to happen before travelling internationally, attending major events or community gatherings.

Vaccination provided the best protection against measles and parents should get their children immunised, the agencies said.

In October, Samoa and Tonga both declared measles outbreaks.

Both UNICEF and the WHO said they were continuing to provide resources to Pacific states to respond to the measles threat.

The decision, reached during the World Health Assembly in Geneva, which wraps up on Tuesday, could help put to rest decades of debate among experts over how to define burnout, and whether it should be considered a medical condition.

In the latest update of its catalogue of diseases and injuries around the world, WHO defines burnout as “a syndrome conceptualized as resulting from chronic workplace stress that has not been successfully managed.”

Mr Tukuitonga tweeted he was honoured to be nominated by New Zealand and Pacific health ministers, alluding to it being time for change.

World Health Organization is encouraging countries to participate in the ‘Race to Million Pledges’ Initiative in a bid to fight the practice of misusing antibiotics.

PNG is part of the race and has collected 254 pledges following the launch of the World Antibiotic Awareness Week yesterday in Port Moresby.

The pledge is a way of getting the support of the public to make a commitment to encourage their peers or family to use antibiotics responsibly and to use good hygiene practices to prevent the spread of germs, thus, limiting the need for antibiotic.

"I have listened carefully to all who have expressed their concerns," WHO head Tedros Adhanom Ghebreyesus said in a statement.

He had previously praised Zimbabwe for its commitment to public health.

But critics pointed out that Zimbabwe's healthcare system had collapsed in recent years.

During the first 20 years of his 37-year rule, Mr Mugabe widely expanded health care, but the system has badly been affected by the collapse of the Zimbabwean economy since 2000.

New WHO head Dr Tedros Adhanom Ghebreyesus praised Zimbabwe for its commitment to public health.

But critics say that during Mr Mugabe's 37-year rule Zimbabwe's health services have deteriorated, with staff regularly unpaid and medicines in short supply.

Dr Tedros, who is Ethiopian, is the first African to lead the WHO.

He was elected with a mandate to tackle perceived politicisation in the organisation.

Dr Tedros replaced Margaret Chan, who stepped down from her 10-year post in June.