They may be consumed up to the use by date. Unopened deli meats generally keep for two weeks. However, once the package is opened, the use by date is meaningless; the meat should be consumed within 3-5 days. This is because anti-oxidative gases that preserve pre-packaged deli meats escape from the packaging once it is opened. Unopened packaged deli meat can be frozen for one to two months.
Chest soreness that is caused by working out used to be attributed largely to the buildup of lactic acid, which is a waste product created by the muscles when strained.
What causes pains in chest muscles?   Answer     It could be a number of reasons. Pain in the ribbed area of the chest is called angina. Extremely severe pains in the chest towards the upper-center â¦and/or upper-left areas can mean a heart attack.     Localized pain more near the stomach area could merely be signs of gas or indegestion.