According to the estimate, 4.9 million children died before their fifth birthday in 2022, a 51% decrease since 2000 and a 62% drop since 1990, according to the report, which still warns such progress is 'precarious" and unequal' In total, 162 million children under the age of 5 have died since 2000, 72 million of whom perished in the first month of life.