Booster shots could soon be recommended for people as young as 40, source says

Booster protection could soon expand to a much broader population, as a source says the US government likely will soon recommend additional doses to people as young as 40 who received a Moderna or Pfizer Covid-19 vaccine. 'I believe it will happen,' the source familiar with the plan told CNN's Elizabeth Cohen. There is 'growing concern within the FDA' that US data is beginning to show more hospitalizations among people under age 65 who have been fully vaccinated, the source said.