how face mask is important in covid 19 ??
Masks are not perfect barriers to
transmission, and should be combined with other preventative measures such as
social distancing and contact tracing.
Universal mask use can significantly
reduce virus transmission in communities.
Based on our prior work in outbreaks
of infectious diseases, we know that clear, consistent messages about what
people can do to protect themselves and their community are critical. By that
measure, the messaging on masks has been confusing.
These are
some of parameters, which tell us why wearing mask is important:
1.
Some scientists says face mask is anti-pollutant
and anti-virus. Universal mask use can significantly reduce virus transmission
in the community by preventing anyone, including those who are unwittingly
carrying the virus, from transmitting it to others. Disease modeling suggests
masks worn by significant portions of the population, coupled with other
measures, could result in substantial reductions in case numbers and deaths.
2.
Face mask is designed in different way to protect
other from being infected. Masks and face coverings can prevent the wearer from
transmitting the COVID-19 virus to others and may provide some protection to
the wearer. Multiple studies have shown that face coverings can contain
droplets expelled from the wearer, which are responsible for the majority of
transmission of the virus. This 'source control' approach reflects a shift in
thinking from a 'medical' perspective
3.
There are certain symptoms which indicates virus
infection. Many people with COVID-19 are unaware they are carrying the virus.
It is estimated that 40% of persons with COVID-19 are asymptomatic but
potentially able to transmit the virus to others. In the absence widespread
screening tests, we have no way of identifying many people who are silently
transmitting the virus in their community.
