As CNN reports:

GOP Sen. Lindsey Graham has tested positive for Covid-19 after being fully vaccinated and has experienced “flu-like symptoms,” he announced Monday.

“I was just informed by the House physician I have tested positive for #COVID19 even after being vaccinated. I started having flu-like symptoms Saturday night and went to the doctor this morning,” he tweeted.

He wrote in a follow-up tweet: “I feel like I have a sinus infection and at present time I have mild symptoms. I will be quarantining for ten days. I am very glad I was vaccinated because without vaccination I am certain I would not feel as well as I do now. My symptoms would be far worse.”