Nice summary of the current situation from the CMO of a Vermont hospital different from the one where I work:
R0
The U.S. media is not giving enough attention to the situation in Europe, particularly the U.K. and Italy
I imagine this is due to pandemic fatigue, a bit of denial, and perhaps a sense that “It is what it is”
The R0 of omicron is proving to be quite high, estimated at 3 to 5, or higher, in the U.K., meaning
A doubling time of 2 to 3 days, and that
Each individual with omicron is transmitting the virus to at least 3 to 5 others, on average
It is easy to see Europe as far away, with different populations and habits, but we would be foolish to think the same situation will not occur here
Indeed, as you have read, the rate of positive tests – almost assuredly due to omicron – accelerated over just the past few days in New York City and other cities in the U.S.
I have written about the epidemiology of transmissivity previously, and you likely are either already knowledgeable on the subject or have reviewed material at some point during the pandemic
Transmissivity can be expressed as the reproduction number, R0, a mathematical description
R0 < 1 means each person with the diseased infects less than 1 other individual, on average, and thus the disease will decline in prevalence
R0 > 1 means each person with the diseased infects more than 1 other individual, on average, and thus the disease will increase in prevalence
Many factors that vary from one population to the next will affect the R0 value, particularly the “contact rate” of the population, meaning how often people interact within the parameters allowing disease spread, or put in another way, urban versus rural existence
Note that
What occurs in NYC does not translate precisely to rural Vermont
What occurs when people exercise few mitigation measures – masking, distancing, and limiting gathering – does not translate precisely to situations in which mitigation measures are reliably practiced
The situations is now clear, however, that
Omicron has a transmissivity of at least twice delta, which had a transmissivity of at least twice the original viral strain
Vaccines are less efficacious at preventing positive tests and mild to moderate disease, although certain vaccines do offer good protection from severe disease, i.e., those that would require hospitalization
Boosters raise protection from omicron to near the level that the primary vaccine series provided against other variants
We will see more infections over the next few months that will disrupt life, including
Staffing shortages at work
Frequent classroom dismissals
Cancelation of sports events
Negative economic impact to businesses
Self-imposed limitations on gatherings
Further impact on capacity of health systems and the quality of the care provided
So what can we do?
Everyone should get a booster when eligible – everyone – as those that do not get vaccinated and boosted are putting others at risk, both directly from spread and indirectly by missing work 
Know that you are boosted and in good shape
Know that if when you get sick, your symptoms will likely be short-lived, similar or less than what you have experienced with the flu
Plan with your family what you will do if when one or more in the household turn positive so that it is not a mad scramble to figure out next steps
Recognize that we will get through the situation, despite a rough few months, and the viral prevalence will drop