Difference between revisions of "Literature"
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| + | Literature search is divided with regards to the factors determining or influencing the infectivity of the influenza virus. | ||
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| + | == Known factors determining the infectivity of the virus == | ||
| + | |||
| + | # constituents of nasal secretions (e.g. mucus present or no) | ||
| + | # type of the surface (smooth or porous), on which the virus was deposited; smooth surface enhances virus spread | ||
| + | # virus type | ||
| + | # virus concentration | ||
| + | # [[Literature:temperature | temperature]] | ||
| + | # [[Literature:humidity | relative humidity (RH) ]] | ||
| + | # exposition to light and UV | ||
| + | # [[Literature:ph | pH ]] | ||
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| + | == Possible routes of infection == | ||
| + | |||
| + | # large droplets (10-20 <math>\mu</math> in diameter) | ||
| + | # aerosol (small droplets of diameter < 5 <math>\mu</math>; aerosols are the source of '''long-range infections'''; it seems, that aerosols are the main route of infection) | ||
| + | # direct contact | ||
| + | |||
| + | Particles of diameter < 3 <math>\mu</math> | ||
| + | <!--i jednostkowej gęstości--> | ||
| + | basically do not settle, particles of diameter 5 <math>\mu</math> settle after ~62 min, and those of diameter 100 <math>\mu</math> settle after 10 s. | ||
| + | There is a notion of droplet nucleous, which is a shrunken by evaporation droplet coming from a sneeze or a cough. Initially it have around 20 <math>\mu</math> diameter but it can shrink twice by evaporation. Such droplet nuclei are highly higroscopic. Most sneeze or cough droplets have diameter < 5-10 <math>\mu</math>. | ||
| + | |||
| + | == Factors influencing long-range infections == | ||
| + | |||
| + | # concentration | ||
| + | # infectious dose | ||
| + | # the number of infectious particles produced | ||
| + | # the duration of shedding by infected carrier | ||
| + | # the stability of the carrier in the environment | ||
Latest revision as of 10:25, 26 September 2008
Virtual society | Virus spread | Literature | Version 
| |
|---|---|
| Relative humidity | pH | Temperature |
Literature search is divided with regards to the factors determining or influencing the infectivity of the influenza virus.
Known factors determining the infectivity of the virus
- constituents of nasal secretions (e.g. mucus present or no)
- type of the surface (smooth or porous), on which the virus was deposited; smooth surface enhances virus spread
- virus type
- virus concentration
- temperature
- relative humidity (RH)
- exposition to light and UV
- pH
Possible routes of infection
- large droplets (10-20
in diameter) - aerosol (small droplets of diameter < 5 ; aerosols are the source of long-range infections; it seems, that aerosols are the main route of infection)
- direct contact
Particles of diameter < 3
basically do not settle, particles of diameter 5 settle after ~62 min, and those of diameter 100 settle after 10 s.
There is a notion of droplet nucleous, which is a shrunken by evaporation droplet coming from a sneeze or a cough. Initially it have around 20 diameter but it can shrink twice by evaporation. Such droplet nuclei are highly higroscopic. Most sneeze or cough droplets have diameter < 5-10 .
Factors influencing long-range infections
- concentration
- infectious dose
- the number of infectious particles produced
- the duration of shedding by infected carrier
- the stability of the carrier in the environment
