The only possible problem with that approach could be if you slip up or somehow end up catching the flu by other means. It could hit you hard. My aunt never ha

The only possible problem with that approach could be if you slip up or somehow end up catching the flu by other means. It could hit you hard. My aunt never had the flu and was barely ill most of her life due to similar behavior. A couple of years ago she caught the flu from someone and it put her in hospital for a few days and then kept her in bed/at home for about 3 months (all told). Everything basically hit her at once. With that said it might be you simply have a naturally higher immuno-response to viruses. I tend to get simply mild colds when the rest of my family are in bed for a week with flu :)