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What were you going for? If its just supposed to be a simple stylized model then its fine.
If you are going for realism then it needs alot more work. both modeling needs more details and shader/texture needs more work.
Later you can also improve on the rendering /presentation by adding some depth of field, like this one https://www.cgtrader.com/3d-models/science/medical/corona-virus-c437cb64-4020-452c-bcf5-a914dc10503d
Thank you a lot for your detailed feedback.
