Figure 1
Contact dynamics, representative and non-representative age contact matrices. Age contact matrices measured during the (a) reference and (b) pandemic period via CATI survey methodology on a representative sample (blue) and via non-representative online data collection (orange) (for methodology see section on Construction of age contact matrices). Data for children under 18 (indicated with asterisk and vertical dashed lines) could not be collected directly due to privacy regulations, thus our data cannot provide a representative sample for the first two age groups. Their contact patterns are calculated based on the adult respondents’ responses on their children’s behavior. For the reference period at the online survey children’s contact patterns were not asked from their parents, therefore we do not have data on children’s contact patterns before the pandemic in the online sample. (c) Timeline of early pandemic regulations in Hungary and the average number of per capita daily proxy social contacts in rural areas (solid green line), the central area (red solid line) of Hungary, and in the whole country (blue solid line). While online data collection was continuously ongoing after the 23rd March 2020, representative data via telephone surveys were collected during the periods assigned by diagonal shading. Blue shades indicate telephone-based data collection (representative survey), while grey shades cover the online observation period of the actual study. Both methods retrospectively recorded the contact patterns about the reference period (before 13th March 2020), except for age groups under 15 in the online questionnaire.
