Can you talk about liquid biopsies?

Can you explain the difference between a cancer originating from inside versus outside the body?

What is a diffusion-weighted MRI?

COVID natural immunity

Is it necessary to have the Covid vaccine if one has had a past natural exposure through infection??

Diterpenes, coffee, and cholesterol

Should we be concerned about the impact of diterpenes in unfiltered coffee on cholesterol levels? Is it worth switch from americanos to paper filtered method?