The delays are occurring around the globe, officials said, and are due to a series of manufacturing difficulties, as vaccine makers scramble to fill vast orders using an old technology that requires growing virus in chicken eggs.Más...
The delays are occurring around the globe, officials said, and are due to a series of manufacturing difficulties, as vaccine makers scramble to fill vast orders using an old technology that requires growing virus in chicken eggs.
No hay comentarios:
Publicar un comentario