Some people are at an increased risk of developing listeriosis, including: those over 60 years of age; pregnant women and their unborn babies; babies less than one month old and people with a weakened their immune system, such as those with HIV or on medication such as chemotherapy.
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Gunshots and explosions have been reported at Istanbul's Ataturk Airport.
Police say they are keeping an open mind about the motive and appealed for anyone with information to come forward.
Rain will clear east through this evening to leave a drier night for most, however showers will continue across some northern areas.