Canada’s top medical officer suggested that residents wear masks when having sex with a partner for the first time in a statement Wednesday.

Reuters reported that Theresa Tam made the advisement along with other tips in a statement addressing how Canadians could minimize the risk of transmitting the virus during sexual encounters.

“Like other activities during COVID-19 that involve physical closeness, there are some things you can do to minimize the risk of getting infected and spreading the virus,” she reportedly said.

Monitoring partners for COVID-19 symptoms before and after sex was also on Tam’s list of guidelines, as well as avoiding facial contact.

“The lowest risk sexual activity during COVID-19 involves yourself alone,” Tam reportedly added.

Her advice echoed guidelines released by the Terrence Higgins Trust, a leading anti-HIV/AIDS organization based in the U.K.

“COVID-19 spreads through virus particles in saliva, mucus or the breath of those who have it. It can also be spread through contact with hard surfaces that someone else who has the virus has touched. COVID-19 can be caught from people who have the virus but do not have symptoms, which means that having sex with someone who doesn’t have COVID-19 symptoms is not a guarantee that you won’t get it,” the organization says on its website.

The website goes on to list a number of sexual activities deemed to be a higher risk of spreading the disease due the the likelihood of transmitting various bodily fluids.