Whenever a virus encounters an unfamiliar organism, the virus may undergo multiple mutations and emerge as a variant that produces:

Explanation

When a virus encounters an unfamiliar organism, it may undergo several mutations during replication. These mutations can lead to significant changes in the virus's genetic makeup, often resulting in variants capable of causing severe and novel diseases. The correct answer is "severe and novel disease" because it encompasses both the potential severity and the novelty of the disease. The other options are incorrect because:Non-mutated: This is inaccurate, as viruses generally mutate when facing new hosts.Novel disease: While true, it doesn't capture the potential severity of the disease, which is critical.None of these is incorrect; mutations often result in new disease variants.