radiation
is NOT a likely route of entry for a bloodborne pathogen
its a way of getting into a course example if you want to do a course but don't have the traditional entry requirements then by following a route will get you to achieve your ambition.
Entering numeric values as text
The most common route of entry for hazardous materials is inhalation, closely followed by skin contact.http://wiki.answers.com/What_is_the_most_common_route_of_entry_for_hazardous_materials#ixzz1tCem38SH
exocytosis
Portal of entry for cholera is your mouth. Transmission of cholera occurs by fecal oral route.
Transocular
Find a trainer that has a pikachu the pokedex entry is #25 a trainer with a pikachu can be found on the route above vermilion city.
Navigation
Because it is prepared from the journal which is the book of "original entry".
The channel in a marina would be the entry/egress route to/from the sea or river.
a portal of entry is the route a pathogen takes to enter a host. Typical routes include : mucous membrane, skin and parenteral.