Harbour of Cattaro, Italy declared infected according to the Weekly Intelligence Summary No. 9 dated 5 March 1921

An item reported that the harbour of Cattaro [nowadays Kotor, Montenegro] was declared to be infected and ships calling in Italy after visiting Cattaro were subject of quarantine measures for pest, cholera and fever.

Source

The National Archives, Kew Gardens, England for the week ending 5-3-1921, CAB-24-120-8