Another study: relating to outdoor exposure
I think the whole concept of "community transmission" is based on the transmissions that you can't find & track. We've had that in Santa Clara County since January apparently. So, just because you can say, "Here's 318 cases we can track" doesn't mean there aren't 5 or 500 cases you can't track, maybe because they were from shopping cart handles, the cough on the street, animal vectors, or what not.
I'm a bit disappointed we haven't seen more/better tracking of cases while we are in shelter in place. Just where are these cases coming from?
(or, maybe like deaths from COVID-19, we just have to wait longer for them to be researched & written)
Related to potential exposure rates:
A study about when were you last out of the house, and how close were you to others, associated by age.
And related to the above, California announced Friday that it would pay for delivery of restaurant meals to qualifying seniors "Restaurants Deliver: Home Meals for Seniors"
Quote:Less attention has been paid to the spread of respiratory droplets in outdoor environments under microclimatologic turbulent wind...
[Simulation] Results show the spread of respiratory droplets is characterized by the dynamics of two groups of droplets of different sizes: larger droplets (400 – 900 μm) are spread between 2–5 m during 2.3 s while smaller (100 – 200 μm) droplets are transported a larger range between 8–11 m by the action of the turbulent wind in 14.1 s average.
I think the whole concept of "community transmission" is based on the transmissions that you can't find & track. We've had that in Santa Clara County since January apparently. So, just because you can say, "Here's 318 cases we can track" doesn't mean there aren't 5 or 500 cases you can't track, maybe because they were from shopping cart handles, the cough on the street, animal vectors, or what not.
I'm a bit disappointed we haven't seen more/better tracking of cases while we are in shelter in place. Just where are these cases coming from?
(or, maybe like deaths from COVID-19, we just have to wait longer for them to be researched & written)
Related to potential exposure rates:
A study about when were you last out of the house, and how close were you to others, associated by age.
Quote:About 52 percent of the adult United States population went out of their home the previous day. On average, adults had close contact with 1.9 non-household members. We find that having at least one COVID-19 symptom (fever, dry cough, or shortness of breath) increased the likelihood of going out the previous day and having additional close contacts with non-household members; however, the estimates were not statistically significant. When disaggregating our analysis by COVID 19 symptoms, we find no strong evidence of greater social distancing by people with a fever or cough in the last two weeks, but we do find that those who experienced shortness of breath have fewer close contacts, with an incidence rate ratio of 0.49 . Having other flu-like symptoms reduces the odds of going out by 0.32 and the incidence rate of having close contacts by 42 percent. We find that older people are just as likely to leave their homes as younger people, but people over the age of 50 had less than half the predicted number of close contacts than those who were younger than 30.Self-selection & other biases are noted.
And related to the above, California announced Friday that it would pay for delivery of restaurant meals to qualifying seniors "Restaurants Deliver: Home Meals for Seniors"