WTF is a Virus? Yes or NO

Most of you have probably seen viruses displayed like this:

Or may be like this:

Or maybe this is what you associate with the word virus:

So what does like actually virus look like? That's something our immune system wonders about too. Viruses exist in many forms and they mend to mutate over time. If our immune system wants to react system to the threads viruses poses, its need that know what is look like to get rids the cells that have been infection.

Generally, there two types of virus. Those without a hull:

And those with one:

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Source:
Lecture “Immunology – Innate immune system” by Barbara Walch-Rückheim
Lecture “HIV – AIDS” by Sigrun Smola

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