An ice dam is a ridge of ice that forms at the edge of a roof and prevents melting snow (water) from draining off the roof. The water that backs up behind the dam can leak into a home and cause damage to walls, ceilings, insulation, and other areas.
VARIVAX is a vaccine indicated for active immunization for the prevention of varicella in individuals 12 months of age or older. Each dose is approximately 0.5 mL after reconstitution and is administered by subcutaneous injection.
Among children vaccinated between ages one and 12 years, the annual rate of breakthrough varicella increased with time since vaccination even adjusting for the same exposure factors. The researchers reported: 1  1.6 cases per 1,000 person-years within the first year (95% CI 1.2 to 2.0).