UNHCR reported Tuesday that 3.53 million people have left Ukraine, with Poland taking in the lion's share more than 2.1 million  followed by Romania with more than 540,000 and Moldova with more than 367,000.

Shortly after the invasion on Feb. 24, UNHCR predicted that some 4 million refugees might leave Ukraine, though it has been re-assessing that prediction. The outflows have been slowing in recent days after peaking at more than 200,000 each on two straight days in early March.

The International Organization for Migration estimates that nearly 6.5 million people are internally displaced within Ukraine, suggesting that some if not most of them might to flee abroad if the war continues.