<qa>  What is the time limit for the patient to return a postage paid standard questionnaire?Reporting for adverse events: Registration of adverse events will start after informed consent and when treatment with study medication has been given and continue until the patient leaves the hospital after the coronary angiographyPCI procedure up to a minimum of 7 days following influenza vaccination. The same time limit will be used in both treatment groups. The patients will be informed to contact the investigator or study nurse if any adverse event should occur during this timeframe. Seven days after vaccination patients will be requested to return a postage paid standard questionnaire to asses if any adverse event has occurred. 