Vaccination before exposure does not eliminate the need for treatment after infection, but it simplifies treatment and may provide protection after unrecognised exposure.

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While the severe adverse health effects from exposure to asbestos were becoming well-known by the early 20th century, manufacturers did not warn their employees of the risks of exposure or provide adequate protection for much of the same century.

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The theory that exposure to potential allergens could offer protection against allergic conditions is gaining weight.

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The net exposure represents the gross exposure less liquid collateral and CDS protection purchase from investment-grade counterparties outside of these countries, Konrad explains.

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Mr Dolan said a study by the National Radiological Protection Board had said exposure levels from living near masts were "extremely low", with the overall evidence suggesting they were unlikely to pose a health risk.

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Third Rail Strategy provides downside protection against steep market losses, while still maintaining exposure to moderate market returns.

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There are no limits on liability exposure for passengers and crew, but the industry will receive protection from claims filed by those killed and injured on the ground in New York and Virginia.

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Because of its widespread use, inadequate protection by manufacturers, and long latency period (it takes about 12 to 20 years after exposure before symptoms appear), an almost un-quantifiable number of people have been harmfully exposed to asbestos.

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