MANILA -- The Department of Health (DOH) on Thursday warned the public against possible harms of "tuob" or steam inhalation, which purportedly kills Sars Cov 2, the virus causing coronavirus disease 2019 (Covid-19).

In a Covid-19 virtual presser, DOH Undersecretary Maria Rosario Vergeire said there is no scientific evidence proving that inhalation of steam with salt, lemon, and other ingredients could prevent Covid-19 infection.

"Ang US Centers for Disease Control and Prevention [USCDCP] at World Health Organization [WHO] ay itinanggi na ang steam inhalation ay nakagagaling sa (The USCDCP and the WHO denied that steam inhalation can treat) Covid-19," Vergeire said.

She also noted that local medical societies do not recommend steam inhalation as a curative or preventive measure.

"May posibilidad pa na maaring sumama sa singaw ang virus na maaari pang pagmulan ng sakit. Ito ay nagpaparami ng secretions sa ilong na posibleng makahawa sa iba sapamamagitan ng pagbahing o pag-ubo (The virus may get into the steam which may cause diseases. It also increases nasal secretions that can be spread through coughing or sneezing)," Vergeire said.

Steam inhalation can also cause skin burns, she added.

According to the DOH, wearing face masks, frequent and proper handwashing, observing physical distancing, and practice of proper cough etiquette remain the best measures to prevent the spread of Covid-19. (PNA