All cabinet ministers are now restricting their movements as a result.
A spokesperson says Minister Charlie Mc Conalogue has no symptoms and is self isolating.
It comes as the HSE warns the risk posed by the virus is at its highest point to date.
It comes as the Government urges people to reconsider their plans for Christmas.
The Government says the decision to return to level 5 restrictions over Christmas was not taken lightly, but the increase in cases could not be ignored.
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Sunny intervals
High: 23°C | Low: 13°C
Sunny intervals
High: 22°C | Low: 13°C
Sunny intervals
High: 26°C | Low: 11°C
Sunny intervals
High: 27°C | Low: 10°C
Sunny intervals
High: 28°C | Low: 11°C
