nAbs play a crucial role in reducing the replication of SARS‐CoV‐2 and are essential in protecting against severe infections caused by the virus.[32] Thus, we assessed generated serum nAbs by measuring the inhibition of the spike RBD‐ACE2 interaction using an ELISA‐based ACE2 competition assay (Figure 2I). Here, ACE2 is linked to infection.