ART4 and COVID-19: Still, the study was terminated prematurely after recruiting 103 patients (half of the planned 200 patients) due to the containment of COVID‐19 in Wuhan.[119] Another study using the more liberal 1:160 antibody neutralization guidelines found at 6 weeks after COVID‐19 diagnosis that 70% of patients showed plasma neutralization activity against SARS‐CoV‐2 and only 25% against its S glycoprotein.