More Yemeni people are infected with the new coronavirus pandemic amid the 5-year-war and other issues challenging the Arab country.

Early on Monday, Yemen’s emergency coronavirus committee declared the port city of Aden — which has served as the seat of Abd Rabbuh Mansur Hadi’s former regime during the Saudi military aggression, an infested city after the number of coronavirus cases there increased to 35, with four deaths.

In a Twitter post, the committee also attributed its decision to the spread of several diseases in the southern city due to the torrential rains that hit it recently.

Aden has become a flashpoint city. Late last month, the so-called Southern Transitional Council (STC), which is backed by the UAE, declared a state of emergency and announced “self-administration rule” in Yemen’s southern regions, including the port city of Aden, sparking tensions with Saudi-backed militants on Socotra Island.

Both the UAE-sponsored separatists and Saudi-backed Hadi loyalists serve a Riyadh-led military coalition which has been waging a bloody war on Yemeni people since 2015.

Earlier this month, the two sides reached an agreement to end infighting, but the STC appears to hold onto its grip on Aden.

An ex-regime official said the chikungunya fever, a viral illness that is spread by the bites of infected mosquitoes, has killed 50 people in Aden, including the governor of Sheikh Othman district.

The source, who asked not to be named, told Anadolu Agency late Saturday that over 3,000 people were infected with the disease.

It is believed that the disease came about due to swamps caused by heavy rains and flooding, which hit the city in mid-April and left eight people, including five children, dead and destroyed houses.

The self-proclaimed Hadi regime, which is backed by the oil-rich kingdom of Saudi Arabia, on Sunday appealed for help from the international community to curb the spread of the coronavirus.

“Medical reports refer to the death and infection of scores of civilians in the light of the crippling health system resulting from the continued war and scarcity of resources,” it said in a statement.

According to the emergency coronavirus committee, Yemen had registered 51 coronavirus cases, including eight deaths as of Sunday, after 17 new infections, 10 of which were in Aden, were recorded.

Amid the spread of the COVID-19 respiratory disease caused by the coronavirus, the World Health Organization (WHO) suspended staff activity at its hubs in Houthi-controlled areas of Yemen.

Authorities announced two coronavirus cases with one death in areas controlled by Houthis, who hold most large urban centers.

In a directive issued late Saturday, the WHO notified staff in the capital Sana’a, the Red Sea port of Hudaydah, the northern province of Sa’ada and central province of Ibb that “all movements, meetings or any other activity” for staff in those areas were halted until further notice.

It added that the UN is operating under the assumption that there is now full-blown transmission in Yemen.

Reuters quoted three sources as saying that the WHO decision aimed to press the Houthi movement to report results of tests for COVID-19.

Saudi Arabia and a number of its regional allies launched the devastating war on Yemen in March 2015 in order to bring former president Hadi back to power and crush the Houthi Ansarullah movement.

The US-based Armed Conflict Location and Event Data Project (ACLED), a nonprofit conflict-research organization, estimates that the war has claimed more than 100,000 lives over the past five years.

More than half of Yemen’s hospitals and clinics have been destroyed or closed during the war by the Saudi-led coalition, which is supported militarily by the UK, US and other Western nations.

At least 80% of the 28 million-strong population is also reliant on aid to survive in what the United Nations has called the world’s worst humanitarian crisis.