Canada's deputy minister of foreign affairs has tested positive for COVID-19.

Marta Morgan has been the top official in the department for just under a year, after leading the Immigration Department, and is the first woman to hold the job.

Minister Francois-Philippe Champagne shared the diagnosis on Twitter.

He wished Morgan a full and speedy recovery and called her an invaluable part of the foreign-affairs team.

Several ministers and MPs have isolated themselves out of concern that they have the respiratory illness but Morgan is the most senior Canadian government figure to test positive.

I’ve been informed that my Deputy Minister, Marta Morgan, has tested positive for COVID-19. She is an invaluable member of our GAC team and I know that all employees join me in wishing her a full and speedy recovery and already look forward to having her back with us. —@FP_Champagne

Champagne himself was tested for COVID-19 when he fell ill in March, following a tour of Latvia, Ukraine and Poland, but the results came back negative.