A 30% difference between SARS-CoV-2 and SARS-CoV in the S1 unit of the S protein means that the binding affinity of this S protein with human ACE2 may have been altered.
Kwa upande mwingine, itasalia kuthibitishwa iwapo uwezo wa kusambazwa kwa ugonjwa wa SARS-COV-2 hupungua baada ya kupitishwa kwa binadamu kama ilivyo katika visa vya SARS-CoV na MERS-CoV.