But not all of the immune cells are fooled by the new disguise and they offer at least some protection, which limits the severity of the infection.

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But the Scottish Salmon Producers Organisation says the Scottish Environment Protection Agency assesses farms before and during operation, and sets limits on the use of chemicals and allowed pollution.

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Mr Wechlin adds that, during charging time, people stay inside the buses - something he says is absolutely safe, as the strength of the magnetic field produced is within the limits recommended by the International Commission on non-ionizing radiation protection (ICNIRP).

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