The World Health Organization has announced a new naming system for variants of interest (VOI) and variants of concern (VOC), the forms of the Covid-19 virus with important mutations.
Each variant will receive a name from the Greek alphabet, in a bid to strip some of the stigma from the emergence of new variants.
Maria Van Kerkhove, the WHO's coronavirus lead, said that "no country should be stigmatised for detecting and reporting variants".
She said the new labels for VOI/VOC are "simple, easy to say and remember and are based on the Greek alphabet, a system that was chosen following wide consultation and a review of several potential systems".
Under the new system, the variant first reported in Kent, England is renamed Alpha, the variant originating in South Africa is called Beta, the Brazilian variant is Gamma and the variant first reported in India is Delta.
The head of the World Health Organization has called for the launch of negotiations this year on an international treaty to boost pandemic preparedness, as part of sweeping reforms envisioned by member states.
Also today, WHO director-general Tedros Adhanom Ghebreyesus told its annual ministerial assembly that the United Nations agency faced a "serious challenge" to maintain its Covid-19 response at the current level and required sustainable and flexible funding.
Earlier - the last of the week-long assembly - health ministers agreed to study recommendations for ambitious reforms made by independent experts to strengthen the capacity of both the WHO and countries to contain new viruses.
The ministers from the WHO's 194 member states are to meet from 29 November to decide whether to launch negotiations on the pandemic treaty.
"The one recommendation that I believe will do most to strengthen both WHO and global health security is the recommendation for a treaty on pandemic preparedness and response," Mr Tedros said.
"This is an idea whose time has come."
It could be a long road ahead if such a treaty is to be reached.
The WHO's Framework Convention on Tobacco Control - the world's first public health treaty - was agreed in 2003 after four years of negotiations.
The WHO, which has been at the heart of the world's sluggish response to the Covid-19 pandemic, faces a potential shake-up to prevent future outbreaks.
Under the resolution submitted by the European Union, and adopted by consensus, member states are to be firmly in the driver's seat of the reforms through a year-long process.
"It's essential that we strengthen global (disease) surveillance and provide the World Health Organization with the authority and the capacity to do this important job for all the peoples of the world," Australian Prime Minister Scott Morrison told the talks.
"If we are to deliver on this ambitious reform agenda, then we must work together and put other issues aside," he said.
The new virus has infected more than 170 million people and killed nearly 3.7 million since emerging in China in late 2019, according to a Reuters tally of official national figures.
WHO's emergencies director, Mike Ryan, welcomed the decisions, saying: "Right now the pathogens have the upper hand, they are emerging more frequently and often silently in a planet that is out of balance.
"We need to turn that very thing that has exposed us in this pandemic, our interconnectedness, we need to turn that into a strength," he said.
Chile's ambassador Frank Tressler Zamorano said on behalf of 60 countries that a pandemic treaty would help "heed the call by so many experts to reset the system".
One panel, headed by former New Zealand prime minister Helen Clark and Ellen Johnson Sirleaf, a former president of Liberia, said a new global system should be set up to respond faster to disease outbreaks to help ensure no future virus causes a pandemic as devastating as Covid-19.
The experts, who found crucial failures in the global response in early 2020, said the WHO should be given the power to send investigators swiftly to chase down new disease outbreaks and to publish their full findings without delay.