What's the plural form of paludal fever? Here's the word you're looking for.
Answer
The noun paludal fever can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be paludal fever.
However, in more specific contexts, the plural form can also be paludal fevers e.g. in reference to various types of paludal fevers
or a collection of paludal fevers.
