Construction: Preventing Fatalities. Construction can be a safe occupation when workers are aware of the hazards, and an effective safety and health program is used. This eTool will help workers identify and control the hazards that commonly cause the most serious construction injuries.
5 June 2014 â¢ 7:45pm. Fasting for as little as three days can regenerate the entire immune system, even in the elderly, scientists have found in a breakthrough described as remarkable.
2Â° Immune Response. If a second dose of the same antigen is given days or even years later, an accelerated 2Â° or anamnestic immune response (IR) occurs. This lag phase is usually very short (e.g. 3 or 4 days) due to the presence of memory cells. The amount of antibody produced rises to a high level. Antibody level tends to remain high for longer.