The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
927, P. 172278 - 172278
Published: April 5, 2024
The
Wells-Riley
model
is
extensively
used
for
retrospective
and
prospective
modelling
of
the
risk
airborne
transmission
infection
in
indoor
spaces.
It
also
when
examining
efficacy
various
removal
deactivation
methods
infectious
aerosols
environment,
which
crucial
selecting
most
effective
control
technologies.
problem
that
large
variation
viral
load
between
individuals
makes
output
very
sensitive
to
input
parameters
may
yield
a
flawed
prediction
risk.
absolute
estimated
with
this
can
range
from
nearly
0
%
100
depending
on
load,
even
all
other
factors,
such
as
mechanisms
room
geometry,
remain
unchanged.
We
therefore
propose
novel
method
removes
sensitivity
load.
define
quanta-independent
maximum
before-after
difference
independent
quanta
factors
like
physical
activity,
or
dose-response
relationships.
data
needed
non-steady-state
calculation
are
just
rates,
volume,
occupancy
duration.
Under
steady-state
conditions
approach
provides
an
elegant
solution
only
dependent
before
after
applying
measures.
applied
compare
impact
relative
humidity,
ventilation
rate
its
effectiveness,
filtering
efficiency,
use
ultraviolet
germicidal
irradiation
results
demonstrate
comprehensive
understanding
strategies
infection,
enabling
rational
decisions
be
made
regarding
specific
context.
proposed
thus
practical
tool
mitigation
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 7, 2024
Abstract
Hypothesis
The
study
shows
for
the
first
time
a
fivefold
difference
in
survivability
of
bacterium
Pseudomonas
Aeruginosa
(PA)
realistic
respiratory
fluid
droplet
on
fomites
undergoing
drying
at
different
environmental
conditions.
For
instance,
2023,
annual
average
relative
humidity
(RH)
London
(UK)
is
71%,
whereas
Delhi
(India),
it
45%,
showing
that
disease
spread
from
could
have
demographic
dependence.
Respiratory
ejections
containing
pathogens
inanimate
surfaces
are
crucial
spread,
especially
nosocomial
settings.
However,
interplay
between
evaporation
dynamics,
internal
flow
and
precipitation
their
collective
influence
distribution
conditions
less
known.
Experiments
Shadowgraphy
imaging
employed
to
evaporation,
optical
microscopy
used
dynamics.
Micro-particle
image
velocimetry
(MicroPIV)
measurements
reveal
Confocal
fluorescently
labelled
PA
elucidates
bacterial
within
deposits.
Findings
finds
rate
drastically
impeded
during
elevated
solutal
concentrations,
particularly
high
RH
MicroPIV
reduced
under
Evaporation
influences
crystal
growth,
with
delayed
efflorescence
extending
crystallisation
times.
forms
denser
peripheral
arrangements
rates
increase
low
rates.
These
findings
highlight
critical
impact
pathogen
persistence
surfaces.
Graphical
abstract
Aerosol Science and Technology,
Journal Year:
2024,
Volume and Issue:
58(3), P. 217 - 243
Published: Feb. 16, 2024
As
COVID-19
swept
across
the
globe,
increased
ventilation
and
implementation
of
air
cleaning
were
emphasized
by
US
CDC
WHO
as
important
strategies
to
reduce
risk
inhalation
exposure
virus.
To
assess
whether
higher
rates
lead
lower
SARS-CoV-2,
1274
manuscripts
published
between
April
2020
September
2022
screened
using
key
words
"airborne
SARS-CoV-2
or
"SARS-CoV-2
aerosol."
Ninety-three
studies
involved
sampling
at
locations
with
known
sources
(hospitals
residences)
selected
associated
data
compiled.
Two
metrics
used
risk:
concentration
detection
rate
in
samples.
Locations
categorized
type
(hospital
residence)
proximity
location
housing
isolated/quarantined
patient
(primary
secondary).
The
results
showed
that
hospital
wards
had
airborne
virus
concentrations
than
residential
isolation
rooms.
A
negative
correlation
was
found
primary-occupancy
areas
changes
per
hour
(ACH).
In
settings,
sample
positivity
significantly
reduced
secondary-occupancy
compared
areas,
but
they
similar
settings.
ACH
negatively
correlated,
though
effect
diminished
when
values
exceeded
8.
While
limitations
diverse
protocols
exist,
considered
this
meta-analysis
support
notion
may
risks
ambient
air.
Buildings,
Journal Year:
2025,
Volume and Issue:
15(6), P. 874 - 874
Published: March 11, 2025
The
large-scale
use
of
air-conditioning
equipment,
while
providing
a
comfortable
living
environment,
has
also
brought
about
series
problems.
This
study
focuses
on
the
growth
and
reproduction
Staphylococcus
aureus
surface
activated
carbon
in
filtration
systems.
Experimental
data
were
obtained
under
temperature
conditions
20
°C
30
relative
humidity
10%,
50%,
75%
RH.
Based
experimental
data,
mathematical
model
was
established
to
predict
aureus.
Logistic
Gompertz
equations
used
fit
curves
different
conditions,
two
models,
commonly
for
simulating
microbial
curves,
compared.
with
best
selected
amount
aureus,
some
guidance
actual
lifespan
adsorbent
filters.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
927, P. 172278 - 172278
Published: April 5, 2024
The
Wells-Riley
model
is
extensively
used
for
retrospective
and
prospective
modelling
of
the
risk
airborne
transmission
infection
in
indoor
spaces.
It
also
when
examining
efficacy
various
removal
deactivation
methods
infectious
aerosols
environment,
which
crucial
selecting
most
effective
control
technologies.
problem
that
large
variation
viral
load
between
individuals
makes
output
very
sensitive
to
input
parameters
may
yield
a
flawed
prediction
risk.
absolute
estimated
with
this
can
range
from
nearly
0
%
100
depending
on
load,
even
all
other
factors,
such
as
mechanisms
room
geometry,
remain
unchanged.
We
therefore
propose
novel
method
removes
sensitivity
load.
define
quanta-independent
maximum
before-after
difference
independent
quanta
factors
like
physical
activity,
or
dose-response
relationships.
data
needed
non-steady-state
calculation
are
just
rates,
volume,
occupancy
duration.
Under
steady-state
conditions
approach
provides
an
elegant
solution
only
dependent
before
after
applying
measures.
applied
compare
impact
relative
humidity,
ventilation
rate
its
effectiveness,
filtering
efficiency,
use
ultraviolet
germicidal
irradiation
results
demonstrate
comprehensive
understanding
strategies
infection,
enabling
rational
decisions
be
made
regarding
specific
context.
proposed
thus
practical
tool
mitigation
