Add a Ico Sphere with 4 Subdivisions.
Select some Faces and enable Individual Origins.
Extrude the selected faces.
Extrude a second time.
Scale the faces.
Add a Subdivision Modifier with at least 4 Subdivisions.
I did the above steps with a few more faces and duplicated the virus some times. Then I got the following scene.
For coloring the virus, I designed the following two materials.
After assigning the two materials to the virus and setting the world background to red I start the rendering process and got the following result.
Then after activating the Depth of Field option in the camera settings and rendering again, I got the final result with some unsharpness in foreground and background.
