How deadly would a bacterium be to humans if it was brought from a completely different star system?
The chance that extraterrestrial bacteria would be deadly to humans is zero. Not just very, very small. Zero. Pathogenesis requires intimacy, which is only attained through millions of years of co-evolution. The need for intimacy is apparent when you look at how bacteria and viruses cause infections and disease. Infection requires binding to a cell Read More …