As seniors age the strength of their immune systems begin to decline from a number of causes including chronic stress, poor nutrition, and previous illnesses. A weakened immune system can render seniors susceptible to coming down with simple colds, but these colds can progress to more serious illnesses such as full-blown pneumonia. For example, pneumonia and influenza continue to be one of the leading causes of death among Americans 65 years of age and older. Along the same line a weakened immune system will make a senior over 60 years of age very susceptible to suffering from outbreaks of shingles. Suffering from shingles is not life threatening like pneumonia, but it is very painful while it is active so that it deprives seniors of the enjoyment of their senior years.
The good news for seniors is that there are ways to achieve an immune system boost against colds, flu and cold facilitated pneumonia. Unlike the flu vaccines that target specific flu viruses, other means are available for building immune system that can defend against any cold or flu virus. A polysaccharide called beta-glucan that is derived from yeast can provide a powerful immune system boost. Similarly vitamin C is one of the vitamins to boost immune system, because it replaces the vitamin C typically lost during infections. The mineral zinc is needed for building the immune system.