Professor Neil Ferguson reportedly allowed a woman to visit his London home on two occasions.
Chief executive of Scottish Chambers of Commerce says Europe and US are key markets for Scottish producers.
Professor Harry Burns said continued widespread Covid-19 testing 'could have kept a lid on things much earlier'.
Researchers interviewed 1469 people who inject drugs for study led by Glasgow Caledonian University.
Bosses with sales between £45m and £250m can apply for the short-term loans and financial support.
Lockdown measures to fight the coronavirus pandemic will remain in place until at least early May.
Mike Russell wrote to Michael Gove, requesting a halt to the withdrawal process during the coronavirus pandemic.
Conservative group leader Thomas Kerr has written to the city treasurer calling for a council tax 'moratorium'.
The move comes after cases of coronavirus in Scotland jumped from 36 to 60 in a day.
The public health approach comes as UK and Scottish governments prepare to host drug summits.
Both events will discuss Scotland's drugs crisis in Glasgow later this month.
Britain officially split from the European Union at 11pm, three-and-a-half years since the Brexit vote.
Constitutional relations secretary Mike Russell will take part in talks with UK Government ministers and counterparts from the Welsh administration.