A man in San Pablo, California, gets a flu shot at a drive-through flu shot clinic Nov. 6, 2014. Justin Sullivan/Getty Images November 13, 2020 Ingredients in flu vaccine won’t hurt you – two pharmacists explain why Terri Levien, Washington State University and Anne P. Kim, Washington State University Many people object to the added ingredients in vaccines. But pharmacists explain why those fears are unwarranted.