This is a very old (relatively) research sample of lanthanum hexaboride. If that chemical name means anything to you, then you likely belong to the 0.01% of the living human population that has been privileged enough to have experience in the realm of electron microscopy, or possibly some other advanced technology involvingthe precise blasting of electrons.
Well-scrubbed hands. University of Buffalo researchers in New York published a study December 27 in the journal Infection and Immunity that found that Streptococcus pneumoniae and Streptococcus pyogenes can live on surfaces such as toys, books and cribs for weeks or even months.
Re: Norovirus on surfaces. Most viruses do. Colds and flus can really only survive for 48 hours on nonporous surfaces but less for porous surfaces. Some viruses can survive for a long time, like months, but you're unlikely to encounter any of these in your life. Norovirus is the hardiest of the common viruses you might catch, and it can survive from 12 hours to about 14 days.