A UN report has revised up the world economic growth as a result of robust rebounds in China and the United States, but warned against fragilities in other economies in the context of COVID-19.

In its mid-year update of its World Economic Situation and Prospects 2021, which was released in January 2021, the UN Department of Economic and Social Affairs (DESA) now predicts the world economy will grow 5.4 percent in 2021 instead of the 4.7 percent forecast in January 2021.

Following a sharp contraction of 3.6 percent in 2020, the world economy will return to positive territory as the world's two largest economies – the United States and China – will register impressive growth, according to the mid-year update, which was released on Tuesday.

DESA revised its forecast for China from 7.2 percent to 8.2 percent, and for the United States from 3.4 percent to 6.2 percent for 2021.

While the global growth outlook has improved, surging COVID-19 infections and inadequate vaccination progress in many countries threaten a broad-based recovery of the world economy, warned the report.

The pandemic is far from over for a majority of countries. Daily new infections were higher in April 2021 than the number of new infections reported daily during the peak of the pandemic in December 2020, the report noted.

With the risks of a prolonged pandemic and insufficient fiscal space to stimulate demand, the world's most vulnerable countries are facing the prospect of a lost decade. The growth outlook in several countries in South Asia, sub-Saharan Africa, and Latin America and the Caribbean, remains fragile and uncertain. For many developing countries, economic output is only projected to return to pre-pandemic levels in 2022 or 2023, according to the report.

Chen Jiahe, chief investment officer in Novem Arcae Technologies, said vaccine supply should be a task for all countries, since no country will be 100 percent safe when trading in a pandemic-hit world.

Women were hit the hardest amid pandemic

The report also highlighted the disproportionate impact of COVID-19 on women.

The pandemic has pushed an estimated 114.4 million people into extreme poverty, of which 57.8 million are women and girls. Job and income losses have been higher for women, as more women than men left the workforce to meet family demands. Women's health and reproductive health suffered massive blows, unintended pregnancies increased, motherhood was delayed and education disrupted, significantly undermining progress toward gender equality. Women also faced increased gender-based violence, and women entrepreneurs were disproportionately affected by business closures, further widening gender gaps in income and wealth.

These severe and disproportionate impacts on women and girls call for more targeted policies and support measures, not only to accelerate the recovery but also to ensure that the recovery is inclusive and resilient, said the report.

Chen warned that increased inequality will cause many social issues, such as reduction of social welfare, unrest among certain social groups, and a return of poverty and diseases.

The alleviation of these inequalities requires international cooperation among governments and more importantly, an end to the pandemic, he said.

"Those countries where the pandemic hit hard may need more support from governments on stopping the virus from spreading."

Another move requiring extra attention, according to Chen, is money printing. He warned that governments shouldn't see this route as a panacea, though it indeed brings liquidity into the economy very fast. Inflation and debt will also be an issue for years, so more subtle fiscal and monetary policies will be safer in a long term.

(Su Xinbo contributed to this story)

(With input from Xinhua)