Gwajin Solidarity don jiyya gwaji ne na asibiti na ƙasa da ƙasa na Mataki na III-IV wanda Hukumar Lafiya ta Duniya (WHO) da abokan haɗin gwiwa suka shirya don kwatanta jiyya huɗu waɗanda ba a gwada su ba ga mutanen da ke asibiti masu fama da cutar COVID-19 . An sanar da gwajin a ranar 18 ga Maris 2020, kuma har zuwa 6 ga Agusta 2021, an dauki marasa lafiya 12,000 a cikin kasashe 30 don shiga gwajin. A watan Mayu, WHO ta ba da sanarwar hadin gwiwar kasa da kasa don samar da alluran rigakafin 'yan takara da yawa a lokaci guda don hana cutar COVID-19, tana mai kiran wannan kokarin gwajin hadin kai na alluran rigakafi . Magungunan da ake binciken sune remdesivir, lopinavir/ritonavir hade, lopinavir/ritonavir hade da interferon-beta, da hydroxychloroquine ko chloroquine . An dakatar da binciken Hydroxychloroquine ko chloroquine a watan Yuni 2020 saboda yanke shawarar cewa bai bayar da fa'ida ba. Gwajin yana da niyyar tantance dubunnan mutanen da suka kamu da cutar ta COVID-19 cikin hanzari don yuwuwar ingancin magungunan rigakafin da ba a tantance ba tukuna musamman don cutar COVID-19, wani tsari da ake kira "sakewa" ko "sakewa" magani da aka rigaya ya amince da shi. ga wata cuta daban.