Through a cut or an injury where any skin has been broken.
An infection through an animal's bite or sting.(Like the West Nile Virus which spreads though mosquito bite, or Rabies though an infected mammal's bite).
Can be inhaled or consumed and go from the lungs into the other organs causing harm internally.
Answer:
Jupiter is known for having a big red spot.
Not always, the toxins may have been absorbed by the body and released in urine
