If the movies are any guide, this is the first step in an outbreak that kills off 99% of the human population on Earth.
More correctly, if real life is any guide...I’m recalling my brush with Ebola virus in Zaire. The nasty little bug was formerly confined to remote areas in the African bush, virtually unknown to the outside world because it killed off its hosts too quickly to allow for transmission to urban areas. No more. Improved transportation systems now allow it to hop a truck to Kinshasa, and board a flight to Europe, and bingo! Ebola outbreak in Paris.