Which of the following describes transmission of a disease by indirect contact?
1. Person A has acne -> Person A and Person B are physically intimate -> Person B does not develop acne
2. Person A has a cold -> Person A sneezes near uninfected Person B
3. deer has Lyme disease -> tick bites deer -> tick bites uninfected person
4. Person A has malaria -> mosquito bites Person A -> mosquito bites uninfected Person B