Quantum questions

The figure below is from my talk on many worlds quantum mechanics. I've tried to boil the issue down to its essentials below. (Warning: basic understanding of quantum mechanics required.)




Objects of increasing complexity can be placed into superposition states in laboratory experiments. Proposals for viruses and bugs (tardigrade arthropods) have been discussed.

Can an "observer" (person) be placed into a superposition state?

Or do they necessarily "collapse" wavefunctions?

If a virus or bug can be placed into a superposition state, why can't you?

See related post: Schrodinger's virus.