Contact tracing of individuals has identified a number of businesses across Greater Glasgow and Clyde including a pharmacy in Inverclyde as being linked to the cases.
An NHSGGC-led Incident Management Team is working with Scottish Government, Health Protection Scotland (HPS) and local environmental health teams to provide advice and support.
None of the cases are experiencing anything but mild symptoms.
Close contacts are being advised to self-isolate and other identified contacts are being followed up and given appropriate advice.
To respect and maintain patient confidentiality no further details will be released at this time.