Recent deaths from kisses:

1
In Nov. 2005, Christina Desforges, a 15 year old Canadian girl who was allergic to peanuts, died after she kissed her boyfriend after he ate peanut butter. Christina Desforges died earlier this week, a few days after receiving the kiss. The teenager, who lived in Saguenay, about 250 kilometres north of Quebec City, received a shot of adrenalin immediately after being kissed but did not recover. The official cause of death was not released. Dr. Nina Verreault, an allergist at the Chicoutimi Hospital in Saguenay, did not want to comment on the case but said peanut allergies are seldom fatal. About 100 people in the United States die of food allergies every year, most from exposure to nuts. Canadian statistics are not available. An autopsy is expected to reveal the exact cause of the teenager's death
Source: Ottawa Sun, 11/26/2005