The World Health Organisation has updated its guidance on the use of masks for control of COVID-19.
“In light of evolving evidence, WHO advises that governments should encourage the general public to wear masks where there is widespread transmission and physical distancing is difficult, such as on public transport, in shops or in other confined or crowded environments,” WHO chief Tedros Adhanom Ghebreyesus said.
He, however, said “masks on their own will not protect you from COVID-19.”
“Masks are not a replacement for physical distancing, hand hygiene and other public health measures. Masks are only of benefit as part of a comprehensive approach in the fight against COVID-19,” he said.
He also warned that masks can also create a false sense of security, leading people to neglect measures such as hand hygiene and physical distancing.
The WHO chief said the cornerstone of the response in every country must be “to find, isolate, test and care for every case, and to trace and quarantine every contact.
“That is what we know works. That is every country’s best defense against COVID-19.”
The use of mask has been a hot topic since the outbreak of the disease in China in December.
The WHO’s updated guidance also contains new information on the composition of fabric masks, based on academic research requested by WHO.
“Based on this new research, WHO advises that fabric masks should consist of at least three layers of different material,” the WHO chief said.
The guidance which is available in WHO’s website has details of which materials it recommends for each layer are in the guidelines.
WHO also provides guidance on how to wash and maintain a fabric mask. It also explains how to use a mask safely.
People can potentially infect themselves if they use contaminated hands to adjust a mask, or to repeatedly take it off and put it on, without cleaning hands in between.
The WHO chief says they had developed this guidance “through a careful review of all available evidence, and extensive consultation with international experts and civil society groups.”
WHO continues to recommend that people who are sick with symptoms of COVID-19 should remain at home, and should consult their health care provider.
People confirmed to have COVID-19 should be isolated and cared for in a health facility and their contacts should be quarantined.
If it is absolutely necessary for a sick person or a contact to leave the house, they should wear a medical mask, WHO said.
WHO continues to advise that people caring for an infected person at home should wear a medical mask while they are in the same room as the sick person.
WHO also continues to advise that health workers use medical masks and other protective equipment when dealing with suspected or confirmed COVID-19 patients.
In areas with widespread transmission, WHO advises medical masks for all people working in clinical areas of a health facility, not only workers dealing with patients with COVID-19.
That means, for example, that when a doctor is doing a ward round on the cardiology or palliative care units where there are no confirmed COVID-19 patients, they should still wear a medical mask.
Second, in areas with community transmission, we advise that people aged 60 years or over, or those with underlying conditions, should wear a medical mask in situations where physical distancing is not possible.
Third, WHO has also updated its guidance on the use of masks by the general public in areas with community transmission.
