As pointed out in the white paper, the U.S. government, instead of facing squarely its failure in response to Covid-19 and reflecting on its shortcomings, has tried to shift the blame and divert people’s attention by shamelessly politicizing SARS-CoV-2 origins tracing. It has severely undermined joint international efforts in the fight against the pandemic and become a weak link in global public health governance. Substantial evidence suggested the Covid-19 might have emerged in the United States earlier than its officially-claimed timeline, and earlier than the outbreak in China. A thorough and in-depth investigation into the origins of the virus should be conducted in the United States. The United States should respond to the reasonable concern of the international community, and give a responsible answer to the world.