Norovirus is commonly known as the winter vomiting bug, a highly contagious winter infection that causes both diarrhoea and vomiting.
According to the study in question, small levels of the virus were detected in just over half of the positive samples.
Currently the FSA have said the potential health impact of the findings is difficult to analyse because researchers have been unable to differentiate between the non-infectious and infectious strains of norovirus in the oysters.
However, the FSA have said the results of the study will be used as part of a review by the European Food Safety Authority regarding what the legal safe level of norovirus in oysters should be.
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