There are many reason why both men and women could become victims of gender-based violence. Sexism, both genders are subject to rape although it is less common within the male population,etc.
If you need more help or further explanation just let me know!!
Answer:
You would use 'is'
Measles 'is' a disease most children experience
Measles 'are' a disease most children experience
The 'is' Sounds better in the sentence