Because COVID-19 is a respiratory disease, the practices aimed at preventing the virus’ transmission focus on mucus and droplets expelled by coughing or sneezing.

But can the virus be spread through other bodily fluids?

The short answer, according to a Q&A from the Centers for Disease Control and Prevention, is that there’s not enough data to know for sure.

From the evidence at hand, though, medical experts have made these observations about the virus officially called severe acute respiratory syndrome coronavirus 2:

Blood, feces: SARS-CoV-2 RNA has been detected, but it’s not known yet whether the virus in such specimens is infectious.

Vomit, urine, breast milk, semen: It’s not known yet whether such fluids from an infected person can contain viable, infectious SARS-CoV-2, the CDC said.

Tears: An alert from the American Academy of Ophthalmology cited the case of the virus being found in the “ocular secretions” of one COVID-19 patient who also had conjunctivitis (pink eye), an inflammation of the eyeball and eyelid. It has not been found in the tears of other COVID-19 patients.

Sweat: There’s no evidence that the virus can be spread by perspiration — though an infectious-diseases expert told a Singapore publication that sweat contaminated by the “gunk on a person’s nose, or if the person coughs” could transfer the virus to another person.