The department collects data on the total number of teachers that are absent each day from school with confirmed COVID-19, as opposed to the total number of positive test results of teachers in an area. As we collect the total number of teachers absent from school, we are unable to determine if the same teacher is absent on consecutive days, so are unable to provide a total for the number of teachers absent in this period.
The proportion of teachers in state-funded schools absent due to COVID-19, since the start of the academic year, can be found on Explore Education Statistics. The lowest geographical level the data is split to is local authority level. Published data for Northumberland is available at: https://explore-education-statistics.service.gov.uk/data-tables/permalink/df96718b-b549-42cb-98f4-4e34afd9ee77.
The latest set of published data is from 11 January, available at this link: https://www.gov.uk/government/statistics/announcements/attendance-in-education-and-early-years-settings-during-the-coronavirus-covid-19-pandemic--6.