The potency of anti-Gal as a natural anti-MCA antibody protecting against viral infections may be inferred from an analogous scenario of the Severe acute respiratory syndrome (SARS) corona virus (SARS-CoV) from a single SARS patient infecting hospital workers in Hong Kong, in the SARS outbreak of 2002–2003 [75]. The gene discussed is GAL; the disease is viral infectious disease.