Let's be conversant with he details in the article so we can come up with a nice submission.

Option A - Incorrect
No certain reference can be drawn from here aside the fact that it bears much semblance with the original question that has been asked.

Option B - Incorrect
Here, it is supposed to be a forecast of what would happen after the virus has become widespread. The statement "with no protection against it"means in the present and past happenings, people are powerless against it even though it isn't clear what the author referred to.

Option C - correct
This is clearly what the author of the report envisaged 'that it's possible people's resistance against the virus would be overcome' if it becomes widespread.

Option D - Incorrect
This statement has rendered the author's report as though claiming that only people without the protection would die. It contrasts with the message that 'people would generally become helpless'.

Option E - Incorrect
This is grammatically incorrect. That noun "virus" has been made plural tense with the use of the pronoun "them"it is not consistent with the writer's position which offered nothing of such.