American researchers from the medical school of Johns Hopkins University in Nebraska found a virus, reducing our mental abilities. As a result, the IQ can be reduced greatly, writes the Independent.

The virus enters through the upper respiratory tract and in the future, gets into brain tissue. Like agents scientists have found in the cells of green algae.

For the experiment, researchers selected 90 people, half of them had serious problems with memory and intelligence that is rapidly declining. Within experience traces of the virus were able to identify 45% of the volunteers, almost half of the tested population.

On a person's mental capacities is influenced by many factors, experts conclude. Even viruses and bacterial infection may affect the level of intelligence.

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