On April 2, 2020, researchers at the University of Pittsburgh School of Medicine reported testing PittCoVacc, a potential COVID-19 vaccine in mice, claiming that "SARS-CoV-2 vaccine subunits S1 administered by microneedles elicited a significant antigen-specific antibody response [in mice] observed 2 weeks post-immunization”.
Tarehe 2 Aprili 2020, watafiti wa Chuo Kikuu cha Pittsburgh cha Shule ya Tiba iliripoti kupima PittCoVacc, chanjo inayowezekana ya COVID-19 katika panya, ikisema kuwa &quot;MNA ilitoa chanjo ndogo za SARS-CoV-2 S1 ilishawishi antijeni yenye nguvu-majibu maalum ya kingamwili [ndani ya panya] ambayo yalionekana wazo kuanzia wiki 2 baada ya chanjo.&quot;