Short answer: Yes, in Jainism viruses are generally regarded as living beings (jivas), even though they are extremely small and lack complex senses like larger animals.

Why:

• Jain ontology treats the life principle (jiva) as a sentient substance that exists in many forms and sizes. All jivas possess the basic soul and are subject to karma, no matter how tiny.
• Microorganisms, including viruses, are understood to be jivas with a life-principle, even though their sensory and conscious capabilities are extremely limited compared to larger beings.
• This view aligns with the principle of ahimsa (non-violence): Jains strive to minimize harm to all living beings, including microscopic ones, whenever possible.

Notes and nuances:

• In Digambar and Shwetambar traditions, the core idea is the same: life is a property of the soul, present in all beings that possess consciousness to any degree. Specific classifications of micro life can vary in philosophical elaborations, but the basic stance that jivas exist across a spectrum of life forms is common.
• Some discussions focus on the extent of perception and senses rather than on the moral status of harming them. The practical implication is to practice compassion and non-violence toward all living beings, big and small.

If you’d like, I can share a concise Jain explanation from classical sources or point to a Jain Knowledge page that discusses jiva and micro-life forms.