Saudi physician Hala Alkattan prepares to inject a Pfizer vaccine at a new coronavirus vaccination center, at the Jiddah old airport, Saudi Arabia, Thursday, Jan. 14, 2021. The Saudi Ministry of Health called on citizens and residents to take the vaccine for free. (AP Photo/Amr Nabil)
A Saudi physician prepares to inject thePfizer-BioNTech vaccine at a coronavirus vaccination centre at Jeddah's old airport. AP

Vaccines are crucial, but they won't spell the end of Covid-19