The aggregate growth of the 19 countries sharing the euro currency is likely to be 4.3% this year and 4.4% in 2022, the European Union's executive arm said, revising upwards its forecast from February of 3.8% growth in both years.
The forecast brings the Commission closer to the International Monetary Fund, which last month said it expected 4.4% growth in the euro zone this year.
There is a clear risk of self-fulfilling adverse dynamics taking hold, through which uncertain economic prospects induce households, firms and governments to hold back on expenditure plans, leading to a decline in overall demand that validates the loss in confidence about the future.
Hoping to prop up the economy until it is ready to reopen, the ECB has pushed borrowing costs to record lows through copious asset purchases and loans to banks at rates as low as minus 1%.
Still, IHS Markit's flash composite PMI, a closely-tracked economic indicator, bounced above the 50 mark separating growth from contraction to 52.5 in March compared to February's 48.8, its highest since late 2018.
Signs of a pick-up in the pace of the European Central Bank's bond purchases have also supported bond markets.