The world economy is facing a to 2021 than expected as coronavirus infections surge and it takes time to roll out vaccinations.

While global growth is still on course to rebound quickly from the recession of last year at some point, it may take longer to ignite and not be as healthy as previously forecast. The World Bank already this month trimmed its to 4% in 2021 and the International Monetary Fund will this week update its own outlook.

Double-dip recessions are now expected in Japan, the and U.K. as restrictions to curb the virus鈥檚 spread are enforced. Record cases in the U.S. are on retail spending and hiring, prompting President Joe Biden鈥檚 new administration to seek an extra $1.9 trillion worth of fiscal stimulus.

Only China has managed a V-shaped recovery after containing the disease early, but even there consumers remain wary with Beijing partly locked down.

High frequency indicators tracked by Bloomberg Economics point to a troubling start to the year with advanced economies beginning on a weak note and emerging economies diverging.

鈥淭hat鈥檚 a reflection of the hard reality that, ahead of widespread distribution of the vaccine, a return to normality is an unlikely prospect,鈥 said Tom Orlik, chief economist at Bloomberg Economics.

It鈥檚 a stark outlook facing policy makers after $12 trillion worth of fiscal support and trillions in central bank money printing failed to cement a recovery. Those from the Federal Reserve meet this week.

Market Optimism

Even as the economic outlook has darkened as the weeks of 2021 ticked by, financial markets have continued to rally on optimism government stimulus and the vaccine roll out will drive a recovery. Global stocks hit an last week.

The unevenness is likely to feature in by global leaders including Chinese President Xi Jinping, his French counterpart Emmanuel Macron and German Chancellor Angela Merkel and others who will speak at an online event the World Economic Forum is holding from Jan. 25 to Jan. 29 instead of its usual meeting in the Swiss ski resort of Davos.

The U.S., Britain and European Union are delivering vaccines, setting up a scenario where some parts of the world reach while others lag, especially poorer economies.

The World Health Organization will warn rich nations on Monday that their economies could be hurt unless they help developing countries speed up vaccination programs, the Financial Times reported, citing a study commissioned by the International Chamber of Commerce.

If the rollout of vaccines in poorer countries maintains its current trajectory, advanced economies faces an output loss of up to $2.4 trillion of their annual gross domestic product before the pandemic because of disruptions to trade and supply chains, the WHO will say based on the ICC research, according to the FT.

鈥淲hile there is light at the end of the tunnel, there is still a long and difficult road ahead before we are out,鈥 said Erik Nielsen, group chief economist at Unicredit SpA. 鈥淪o long as the pandemic terrorizes part of the world, normality will not be restored anywhere.鈥

The optimistic outlook rests on authorities getting the out on a material scale by mid-year and neutering the threat of more transmissible variants of the virus. The ongoing provision of and hope that governments won鈥檛 pull back their support prematurely as some did after the financial crisis should also assist.

Lockdowns and other restrictions on movement also appear to be having less of a detrimental economic impact this time than last year as consumers and business have found ways to adapt. And China鈥檚 lead in the shows what鈥檚 possible once the virus is controlled.

鈥淭he first quarter will be worse than we had thought,鈥 said Shaun Roache, Asia Pacific chief economist at S&P Global Ratings in Singapore. 鈥淏ut we see a delayed, not derailed recovery.鈥 鈥 Bloomberg