Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The chosen contact matrices for i) homogeneous contact structure, ii) pre-COVID contact structure, and iii) “almost” pre-COVID structure with reduced potentially-contagious contacts in schools for Germany (A-C), Finland (D-F), Italy (G-I) and the Czech Republic (J-L). Entries of the matrices show the contact intensity between age groups normalized to give each matrix a spectral radius of 1.
