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 COVID-19 Vaccine pattern background

Covid-19 Vaccinations In La County

as Of January 22, 2021 (updated Weekly)


AS OF 1/12/2021


Second Doses: 88,985

Doses Reported Through Surveys of Inventory at Facilities

As of Cumulative Doses Allocated to the County* Number of Doses Administered Based on Surveys of Facilities** % of Doses Administered Based on Surveys
1/12/21 685,075 525,747 76.7%
*Cumulative doses allocated assumes 5 doses per Pfizer vial.
**Doses are calculated as administered based on subtracting remaining inventory of doses reported by facilities from the doses they were allocated.

Doses Reported By State Systems and Hospital Lists, By Week of Vaccine Shipment Arrival

The reporting of vaccine administration data into the state systems is consistently an under-count of actual number of doses administered locally, due to incomplete and delayed reporting into these systems. In order to have a more reliable estimate of vaccine administration by facilities in LA County, we have instituted a weekly survey of administering facilities, through which we are able to obtain self-reported data for number of vaccines administered by each facility. We have presented the cumulative number of doses administered using both sources of data.

Year Arrival week Weekly Doses Arriving Cumulative Doses in County Cumulative # of Doses Administered % of Doses Administered
2020 14-Dec 82,875 82,875 63,566 (as of 12/24) 76.7
2020 21-Dec 165,350 248,225 114,522 (as of 12/31) 46.1
2020 28-Dec 109,325 357,550 217,831 (as of 1/7) 60.9
2021 4-Jan 133,575 491,125 344,563 (as of 1/14) 70.2
2021 11-Jan 193,950 685,075 441,430 (as of 1/21) 64.4
2021 18-Jan 168,575 853,650 Pending Pending
*Weekly and cumulative doses assumes 5 doses per Pfizer vial.
**Cumulative number of doses administered is underreported due to reporting delay and challenges using State systems. Cumulative doses administered 10 days after the week of arrival accounts for reporting delay and the time needed for distribution, appointment scheduling, and vaccine administration.

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Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.

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