COVID-19 vaccine safety questions and answers for healthcare providers (CONSIDER). Issue 18 (28th April 2021) - Kochhar, Sonali; Dubé, Eve; Graham, Janice; Jee, Youngmee; Memish, Ziad A.; Menning, Lisa; Nohynek, Hanna; Salmon, Daniel; Top, Karina A.; MacDonald, Noni E.