It's an article on this theme:if chronic depression and mood disorders might actually be caused by a persistent infection by the common cold cold virus.
http://www.dailymail.co.uk/health/a...cteria-virus-prevented-jab-expert-claims.html
It's very, very unusual. Nobody uses that.
If you want to make a beautiful all-around gift, engage in research.
Ask the person who studies this if they do not need a technician.
If you work there you can recommend me: "Professor do not need a biophysicist?"