今日话题 奥巴马阳了和辉瑞第四针 今天下午奥巴马发了个推文： I just tested positive for COVID. I’ve had a scratchy throat for a couple days, but am feeling fine otherwise. Michelle and I are grateful to be vaccinated and boosted, and she has tested negative. It’s a reminder to get vaccinated if you haven’t already, even as cases go down.— Barack Obama (@BarackO