Here are a few options, with the first being the most direct translation.

Option 1 (Direct & Formal): Kenya Must Win the Fight Against Election Disinformation

Other formal options with slightly different nuances:

• Option 2 (Emphasizing Integrity): Safeguarding Kenya’s Electoral Integrity: A Mandatory Victory Against Disinformation

• Option 3 (Emphasizing the Consequence of Failure): Countering Election Disinformation: An Urgent Imperative for Kenya

• Option 4 (More Assertive): Kenya’s Election Disinformation Battle Must Be Won