Lagos (AFP) - Residents of Nigeria's economic hub Lagos scrambled for hygiene products Friday, after the chaotic megacity of 20 million announced the first confirmed case of new coronavirus in sub-Saharan Africa.

Health Minister Osagie Ehanire said in a statement overnight that the infected person was an Italian citizen who flew in from Milan, at the heart of Europe's largest outbreak, earlier this week.

"The patient is clinically stable, with no serious symptoms," Ehanire said, adding that he was being treated at a hospital for infectious diseases in Lagos.

The low number of cases so far across Africa, which has close economic ties with China, the epicentre of the deadly outbreak, has puzzled health specialists.

Prior to the case in Nigeria, there had been just two cases on the continent -- in Egypt and Algeria.

Nigeria, Africa's most populous country with some 190 million people, is viewed as highly vulnerable to viral spread given its weak health system and high population density.

Worried inhabitants of Lagos, a city hit by the West African Ebola epidemic in 2014, were already flocking to pharmacies Friday morning in search of hand sanitiser and masks.

"We are sold out for now, people came massively this morning," a worker at a pharmacy on Lagos Island told AFP.

"Masks are scarce in town, we tried to order some and we couldn't get them so people should use a handkerchief instead."

One customer refused to shake hands as he said he was struggling to buy hygiene products.

"I've been trying to find hand sanitiser everywhere, they don't have it anymore in the supermarket, they don't have it at the pharmacy, I'm upset," John said, giving only his first name.

"This epidemic is so scary, we should be very careful."

- 'Biggest concern' -

The delay in the first confirmed case in sub-Saharan Africa appears to have given the region a chance to get better prepared -- with more than half of the countries establishing laboratories to diagnose the virus.

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But the World Health Organization (WHO) has still called for the continent "to come together to be more aggressive in attacking" the issue and said the "biggest concern" is outbreaks in countries with fragile health systems.

Kenya's high court on Friday ordered the suspension of flights from China after an uproar over the government allowing travellers into the country without compulsory quarantine for the new coronavirus.

The region of West Africa already has the bitter experience of dealing with the devastating Ebola outbreak that killed some 11,000 people from 2013 to 2016.

The disease's arrival in Lagos in 2014 set off alarm bells across the globe and unleashed a wave of panic among residents.

In the end Lagos escaped relatively lightly and only seven people died from a total of 19 infected, with the WHO praising the fast response.

Nigerian officials moved quickly Friday to reassure the population that the country was prepared to contain the spread of the new coronavirus.

"We have continued to beef our own security. The level of preparedness continues to improve of Nigeria every day," the health minister, Ehanire, told a press conference in the capital Abuja.

Health officials said the infected person flew to Lagos via Istanbul on Turkish Airlines on Monday and spent a night in a hotel before heading to the company offices of French-Swiss firm Lafarge outside the city.

"We have immediately identified all personnel that have had remote or direct contact with the individual concerned and initiated an isolate, quarantine and disinfect protocol," the company said in a statement.

The authorities say they have set up quarantine centres in Lagos and Abuja and there are four laboratories in the country with the capacity to diagnose the virus.

- 'Lessons from Ebola' -

The director general of the West African Health Organisation Stanley Okolo insisted this month that the region had "learnt from the lessons of Ebola".

He said members of the Economic Community of West African States (ECOWAS) bloc agreed recently to come up with a "regional cost plan" and estimated that up to $50 million was required.

"The devastation of an epidemic affects everybody," he said.

Situated in a tropical region close to the equator, Nigeria has had to face the threat of multiple contagious diseases.

An outbreak of Lassa fever, which is spread mainly through rat faeces and urine, has killed over 100 people across the country since the start of the year.

Experts say the oil-rich economic powerhouse is better prepared to deal with any disease epidemics than some of its poorer neighbours in the region.

But the government is criticised for not spending enough on health and crumbling infrastructure, corruption and the departure of doctors to better paying jobs abroad have eaten away at the sector.