Fig. 4

Sera from patients infected by endemic coronaviruses have no cross-neutralizing activity against SARS-CoV-2. A Characteristics of samples from patients infected with other coronaviruses. B Seroconversion assessed by anti-N (left) and anti-S (middle) SARS-CoV-2 or neutralization measured by SARS-CoV-2pp (right). For neutralization assays, a commercial anti-S antibody was used as a positive control (control+) and five prepandemic serum samples were used as a negative control (control−)