Organizația Mondială a Sănătății are în evidență opt potențiale vaccinuri, aflate în faza 1 sau 2 de testare pe oameni, arată un document obținut de Mediafax.
Sunt firme farmaceutice din China, SUA, Marea Britanie sau un consorțiu. Iată care sunt acestea:
CanSino Biological Inc./Beijing Institute of Biotechnology Faza 1 şi 2 de testare
Moderna/NIAID Faza 1 şi 2 de testare
Wuhan Institute of Biological Products/Sinopharm Faza 1 şi 2 de testare
Beijing Institute of Biological Products/Sinopharm Faza 1 şi 2 de testare
Sinovac Faza 1 şi 2 de testare
University of Oxford Faza 1 şi 2 de testare
BioNTech/Fosun Pharma/Pfizer Faza 1 şi 2 de testare
Inovio Pharmaceuticals Faza 1 de testare
Din punct de vedere geografic, companiile aflate aproape de găsirea unui vaccin eficient, patru sunt din China. Alte două companii sunt din SUA, una este din Marea Britanie şi iar ultima este o combinaţie între o companie americană, chineză şi germană.
Ce înseamnă etapa 1 şi 2 de studii clinice
Încercări în faza I
Acestea au ca obiectiv principal determinarea dozei maxim tolerată – MTD sau doza minimă eficientă. Numărul de subiecţi este de obicei redus sub 50. Se studiază şi defineşte profilul farmacologic al produsului (absorbtia, distributia, metabolizarea, excretia si durata de actiune). Din punct de vedere metodologic se utilizează niveluri de doze crescute treptat, pe loturi mici de pacienți (deobicei sub 10), până când toxicitatea ajunge la un nivel predeterminat sau până când apare toxicitate neaşteptată.
Încercări în faza II
Au ca scop principal determinarea eficienţei produsului (rata de răspuns a unei anumite condiţii patologice la adminstrarea terapiei) şi de a depista efectele adverse. Numărul de subiecţi este între 50-200.
Sinovac, compania din China, va încheia prima etapă de studiu pentru primele două faze ale testării, la 13 decembrie 2020. Ulterior fazelor 1 şi 2 urmează etapele 3 şi 4, când vaccinul poate fi dat populaţiei generale.
La nivel global sunt 4.737.926 de cazuri cu COVID 19, iar 313.636 şi-au pierdut viaţa în urma infecţiei.
Sursa foto: EPA
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