According to Fox News, on the 21st local time, US President Biden, who tested positive for covid-19, posted a video on his social media to report that he was safe. (image source: screenshot of US President Biden on social media.) According to reports, Biden said in the video that he felt good and had mild symptoms. He said that he had received two doses of vaccine and two booster injections, and his symptoms were very mild. Biden also said, "I am in good condition this morning. I have done a lot of work. I will continue to complete it. At the same time, thank you for your concern and maintain confidence. Everything will be fine.". Earlier that day, the White House issued a statement saying that Biden tested positive for covid-19 in the morning. At present, he has only mild symptoms. He began to have runny nose, occasional dry cough and fatigue the night before, and has begun to take covid-19 treatment drugs. White House press secretary Jean Pierre said Biden would be quarantined in the White House and would continue to perform his duties in full during this period. According to US media reports, Biden's wife Jill Biden tested negative for novel coronavirus. (Xinhua News Agency)