"Surua ni mbaya"

Translation: Measles are bad

[TessEwing1]

Now "measles is bad" is considered wrong. "Measles" is a disease-- singular. There is no such thing as a measle!

[FauxShizzle]

I thought "Measles is bad" was wrong, but apparently it is indeed singular.

[MIKSTRUDLES]

I looked it up and measles is bad is also right in English, it should be accepted

[ABCSxW]

I reported it 10/10/19

[KathyKerns]

Same 01/21

[dibsmft]

Measles is plural in form, but usually used with a singular verb.
Thus 'measles is bad' is to be preferred.