Doctors say CDC should warn people the side effects from Covid vaccine shots won’t be ‘a walk in the park’ (Source cnbc.com) The CDC must be transparent about the side effects people may experience after getting their first shot of a coronavirus vaccine, doctors urged during a meeting Monday with CDC advisors. Dr. Sandra Fryhofer said that both Pfizer’s and Moderna’s Covid-19 vaccines require two doses and she worries whether her patients will come back for a second dose because of potentially unpleasant side effects after the first shot. Both companies acknowledged that their vaccines could induce side effects that are similar to symptoms associated with mild Covid-19, such as muscle pain, chills and headache.