""I was not there!" is a non-contracted denial. "I wasn't there" is a contracted denial. Someone trying to hide his guilt may use formal grammar more than he normally would. To many, avoiding...
Most of the time syphilis is transmitted via sexual contact with an infected person.
infected animals
You can get mono from making out with people.
Similarly to the way you would get a cold or the flu, but SARS is very Uncommon.