Link to pdf version of this blog: Dec 2021 RIDOH analyses of natch vs. vax acquired immunity to C19
Bottom line:
There was ~6X lower risk of covid-19 hospitalization and ~28X lower risk of covid-19 death, comparing those with natural immunity to covid-19, regardless of vaccination status, to those fully vaccinated
Hyperlink to e-mail from Rhode Island Department of Health (RIDOH) releasing data: December 2021 data latter from RIDOH
Link to excel file with raw RIDOH data: RIDOH Dec 21
RIDOH data on covid-19 variants:
Estimates of fully vaccinated, not fully vaccinated, and previously infected at November, 2021 midpoint (11/15/21) from RIDOH, U.S. census data (July 1, 2021; n=1,095, 610) https://www.census.gov/quickfacts/fact/table/RI/PST045219, and https://covidestim.org/ (a CDC sponsored website run by Harvard, Stanford, & Yale epidemiologists; n=66% of Rhode Islanders were infected, cumulatively, at some point during the pandemic as of 12/16/21):
–756,950 fully vaccinated
–338,660 not fully vaccinated
–723,103 with a history of prior infection at some point during the pandemic
1,243 hospitalizations (with/from covid-19)
–395 (38.8%) among fully vaccinated; Rate= 52.2/100,000
–848 (68.2%) among not fully vaccinated; Rate= 250.4/100,000
–54 (4.3%) among previously infected regardless of vaccination status; Rate= 7.5/100,000
152 deaths (with/from covid-19)
–59 (38.8%) among fully vaccinated; Rate= 7.8/100,000
–93 (61.2%) among not fully vaccinated; Rate= 27.5/100,000
–2 (1.3%) among previously infected regardless of vaccination status; Rate=0.3/100,000
Rhode Island raw data on covid-19 infections by vaccination and prior infection status, December, 2021
Rhode Island relative risk estimates for hospitalizations and deaths comparing fully vaccinated (n=363 hospitalizations; n=58 deaths) to those with a prior infection (n=54 hospitalizations; n=2 deaths), regardless of vaccination status, December, 2021
