Explain why the flu shot must be taken yearly, while other vaccines are longer lasting. Explain antigenic shift and antigenic drift. Explain why most new influenza strains arise in Asia or other rural areas. Explain why HIV and hemorraghic fever viruses are so virulent. Explain how the type of genome of the virus effects its behavior as a pathogen in humans.
Malaria is one of the world's top killers.
Interrupting this life cycle at any point can prevent the spread of malaria. Name at least 4 measures that would interrupt this life cycle at different stages and break this deadly cycle. Eating rare pork is particularly dangerous because of the life cycle of Trichinella spiralis. Explain why trichinosis is a more dangerous helminth infection than pork or beef tapeworm. The new vaccine for rabies which is in trials on Cape Cod seems quite effective.