Pathogens

Sars-Cov-2

Antibody half-life: Antibodies start to decline after 1 month with a half life of 85 days [1]
Aerosol infectivity half-life: 90% of infectivity was lost in 20 minutes, correlates to a half-life of 6 minutes. [2]
Cardboard half-life: 3.46 hours, detectable to 24 hours [3]
Plastic, stainless steel half-life: 5.6 and 6.8 hours respectavely, detectable to 3 days [3]
post covid lung fibrosis (omicron): 2-6% rate in moderate cases [6]
Incubation period (omicron): 3.2 days (SD: 2.2 days) [[9]]
Contagion probability: within 1 meter 13%, further than 1 meter 3% [10]
Prevalence: As of late 2023, 1/20k people are infected at any given week (usually the infectious time) -- this was calculated by gathering data and multiplying the cases by ten. [15]
Coming into contact with 40 people per day would result in a 0.28% chance of becoming infected per year:
x = (.13 + .03) - (.13 * .03)
y = 1/20k
P = 1 - (1 - xy)^365

Influenza

Antibody half-life: Antibodies start declining after 7 weeks with a half-life of 26.5 weeks [4]
Surface half-life: 3 hours, average lifetime is 11 hours [5]
Aerosol half-life: 31.6 minutes, 2.4 minutes in sunlight [7]

Contagion probability in the same household is 38%, with the data above and knowing living in the same household increases spread by 18-fold, we can calculate that the contagion probability is 2% when further than 1 meter, and 9% within 1 meter. [14]

Contagion probability increases by 11% per 1 Celsius decrease. [14]

3% of people in U.S.A. become infected with influenza per year, this would mean at any given day there is a 0.008% chance of someone being infected.

If you are near 40 people per day, you have a 0.036% chance of becoming infected with influenza per day:

1 - (1 - ((.02+.09) - (.02*.09)) * .008%)^40 = 0.036%

Norovirus

Half-life: 2.5 days [8]

HSV

Survival outside body: 4.5 hours [11]
Survival in water: HSV-1 survived 4 hours in tap-water and 24 hours in distilled water. [11]
Hsv-1 oral shedding rate (asymptomatic): 3.9% [12]
Hsv-1 oral overall shedding rate (asymptomatic): 1% [16]
Hsv-2 oral overall shedding rate (asymptomatic): 0.06%

Epstein-Barr virus (mono)

Viral oral shedding rate peaks 2 months after onset of illness. Oral shedding then continues for 28 days to 3.1 years after that, with the median being 5.2 months. [13]

Sources

[1] - https://academic.oup.com/cid/article/73/12/2366/6162856
[2] - https://www.medrxiv.org/content/10.1101/2022.01.08.22268944v1
[3] - https://www.montana.edu/diseaseecologylab/covid19blog/transmission-and-spread/coronavirus-surface-persistence.html
[4] - https://pubmed.ncbi.nlm.nih.gov/29309522/
[5] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1563736/
[6] - https://pubmed.ncbi.nlm.nih.gov/34451904/
[7] - https://academic.oup.com/jid/article/221/3/372/5645407
[8] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2446857/
[9] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8832521/
[10] - https://www.cebm.net/covid-19/what-is-the-evidence-to-support-the-2-metre-social-distancing-rule-to-reduce-covid-19-transmission/
[11] - https://pubmed.ncbi.nlm.nih.gov/6315978/
[12] - https://jamanetwork.com/journals/jama/fullarticle/2797619
[13] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5007628/
[14] - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5913573/
[15] - https://usafacts.org/visualizations/coronavirus-covid-19-spread-map/
[16] - https://pmc.ncbi.nlm.nih.gov/articles/PMC1744863/