Ntchito yophunzirira katemera wa COVID-2019 ya Beijing Institute of Biological Products-Pulojekiti yayikulu kwambiri padziko lonse lapansi yopanga katemera wa coronavirus. Ntchitoyi yalandira thandizo lalikulu kuchokera ku gulu lofufuza katemera la Beijing ndi chitukuko. Mugawo loyamba ...