On October 13, The Wall Street Journal published a report citing research by Yi Fuxian, a scholar at the University of Wisconsin–Madison, saying that China's actual population may be around 1.27 billion, about 130 million fewer than the officially announced 1.4 billion, based on evidence including vaccine dosages, census data, and discrepancies in school-age population records, and noting that overestimating the population could exacerbate strategic miscalculations between China and the United States.