A. It prevents further infection to other strains or the virus
B. It produces immunity to the strain of virus that invaded it
C. It becomes immune to type A, B and C viruses, but not to various strains within the types.
D. After a temporary immunity, it becomes even more susceptible to the strain that caused the influenza.
সঠিক উত্তরঃ
C.
It becomes immune to type A, B and C viruses, but not to various strains within the types.
