The coronavirus pandemic is threatening the entire human race, the United Nations warned Wednesday as it launched a humanitarian response plan featuring an appeal for $2 billion to help the world's poorest and most vulnerable people."Covid-19 is threatening the whole of humanity - and the whole of humanity must fight back," Secretary General Antonio Guterres said in announcing the initiative."Global action and solidarity are crucial. Individual country responses are not going to be enough."Just last week, as the novel coronavirus spread to more and more countries, killing thousands and infecting many more, Guterres warned that unless the world came together to curb the spread, millions of people could die.The plan "aims to enable us to fight the virus in the world's poorest countries, and address the needs of the most vulnerable people, especially women and children, older people, and those with disabilities or chronic illness," said Guterres.If fully funded, "it will save many lives and arm humanitarian agencies and NGOs with laboratory supplies for testing, and with medical equipment to treat the sick while protecting health care workers," he added.The amount of money sought by the plan is small compared to the $2 trillion that the US Congress is poised to approve as a rescue effort for devastated American consumers, companies and hospitals as the world's largest economy grinds to a sudden halt.Two scenariosThe UN plan is designed to last from April to December - suggesting the world body does not see the health crisis abating any time soon.The exact total of $2.012 billion is supposed to flow in in response to appeals that various UN agencies, such as the World Health Organization and the World Food Programme, have already made.Guterres said that in parallel, humanitarian aid provided yearly by member states to help 100 million people around the world must continue. Otherwise, he said, the coronavirus pandemic could lead to rampant outbreaks of other diseases such as cholera and measles, as well as higher levels of malnutrition.#COVID19 is menacing the whole of humanity – and so the whole of humanity must fight back.-- @antonioguterres at launch of Global Humanitarian Response Plan for #coronavirus. https://t.co/vusV9bnhSM pic.twitter.com/ftPtvRNI12— United Nations (@UN) March 25, 2020 "This is the moment to step up for the vulnerable," Guterres said.FacilitiesAs spelled out in an 80-page booklet, the UN plan will be carried out by UN agencies that work directly with non-governmental organisations (NGOs). It will be coordinated by the UN under-secretary general for humanitarian affairs, Mark Lowcock of Britain. The money will be used for a variety of purposes: to set up hand-washing facilities in refugee camps, launch public awareness campaigns and establish humanitarian air shuttles with Africa, Asia and Latin America, the UN says.The exact needs of some countries are still being identified.The plan names 20 or so as deserving top priority for aid, including some enduring war or some degree of conflict, such as Afghanistan, Libya, Syria, the Central African Republic, South Sudan, Yemen, Venezuela and Ukraine. But countries such as Iran and North Korea are also analyzed in the booklet. The plan foresees two general scenarios as to how the pandemic might evolve.Under the first, the pandemic is brought under control relatively quickly as its rate of spread slows over the course of three or four months. This, it says, would allow for a relatively swift recovery in terms of public health and the economy. But under the second model, the pandemic spreads quickly in countries that are poor or developing, mainly in Africa, Asia and parts of the Americas. "This leads to longer periods of closed borders and limited freedom of movement, further contributing to a global slowdown that is already under way," said the UN.