In this context: "This [subject] [verb clause] by boosting our [body's || bodies'] immune system?"
In this case the writer is using "our" as a generic substitution for "your". The argument went that "our body" is actually short for "each of our body", hence taking the singular form.
I maintain that since "our" is plural, bodies must agree with the number.
My recommendation was to disambiguate by changing "our" to "your". But in the example sentence above without making this substitution, which is correct?