In 1976, an outbreak of porcine H1N1 influenza A was observed in American army recruitment camps in Fort Dix, New Jersey. Despite this outbreak being relatively limited to recruitment camps, American health authorities implemented, in the general population, a massive vaccination campaign against this influenza strain. Before being abruptly stopped because of an increase in the number of cases of Guillain-Barre syndrome, over 48 million people had been vaccinations against this disease. Jointly to the mass vaccination campaign, the CDC had implemented a national surveillance program for post-vaccination side effects and had only 11 cases of post vaccination anaphylaxis registered. None of these cases occurred in egg-allergic patients. However, we are unaware of the number of people vaccinated who had an egg allergy, which limits the scope of the observed results.