denooJ
JF-Expert Member
- Mar 31, 2020
- 18,509
- 68,228
Mbona unatoka nje ya mada tena, naona hujui hata herd immunity ni kitu gani.Aliyekwambia herd immunity inategemea chanjo ni nani? ni asilimia ngapi ya watu wamewahi kuchanja malaria.....nenda kawapime kama hawana hiyo kinga ya malaria, tatizo mnashadadia mambo ambayo hamna uelewa hata tone....