Which one among the following diseases does not yet have any effective

Which one among the following diseases does not yet have any effective vaccine ?

Chicken pox
Typhoid
Viral Hepatitis C
Human Papilloma virus
This question was previously asked in
UPSC Geoscientist – 2024
C
As of late 2023 / early 2024, effective vaccines are available for Chickenpox, Typhoid, and Human Papilloma Virus (HPV). However, there is no effective vaccine currently available to prevent Viral Hepatitis C infection.
While there is no vaccine, Hepatitis C is curable with antiviral medications. Research is ongoing to develop a vaccine for Hepatitis C, which is caused by the Hepatitis C virus (HCV). The virus is primarily transmitted through blood-to-blood contact.