Fox News host John Roberts received backlash on Twitter on Monday after questioning the efficiency of the COVID-19 vaccine following the death of Colin Powell.

Powell, 84, was fully vaccinated and had been previously diagnosed with multiple myeloma, a blood cancer that weakens the body’s ability to protect against infections.

Roberts tweeted “the fact that Colin Powell died from a breakthrough COVID infection raises concerns about how effective vaccines are long term.” Roberts deleted the tweet after receiving backlash and later tweeted he was not anti-vax and that he was excited to get vaccinated, hoping it would speed up the return to normal life.

According to the Centers for Disease Control and Prevention, out of the 187 million vaccinated Americans, there have been 7,000 breakthrough cases resulting in death, with 6,000 of those being over the age of 65.

Many of the country's top leaders have expressed condolences after Powell's death.

He was the first African-American to serve as Secretary of State. He rose to prominence during the Persian Gulf War in 1991, when he served as the Chairman of the Joint Chiefs of Staff.