This article was a real revelation and is the only one I have seen that offers real explanations and examples of risks which people can take on board and apply to their own situations. We need more information of this type. Keep it coming.
What I would like to know is - what do we know about repeated small exposures to the virus, each of which is below the minimum infective dose? If say one was exposed several times to very small numbers of viral pariticles which did not result in a clinical infection, is there a chance that the immune system would flag up these small invasions and T lymphocytes absorb the virus to mount a preparatory immune response so that future assaults by the virus would be less damaging? In other words could this mechanism constitute a subclinical infection?