1267 - Analytical Reasoning

1. The microbe A causes the contagious disease A.
2. The first symptoms appear after a period of two days since the microbe A enters the body.
3. The microbe A is found in some flies and bees.
4. A fly bit Jack on Monday, February 6.
5. Nick worked with Jack the next day, Tuesday, February 7.

There were no other possibilities of exposure to Disease A.