(CNN)President Joe Biden on Tuesday gave credit to the Trump administration for the development of the Covid-19 vaccine and praised his predecessor, Donald Trump, for getting a booster shot -- marking a rare moment where the two men have found common ground since Inauguration Day. "I got my booster shot as soon as they were available," Biden said during a speech from the White House about his administration's efforts to address the Omicron variant of Covid-19, adding, "and just the other day former President Trump announced he had gotten his booster shot."