Table 2. COVID-19 attack rates by class type and grade at an elementary school, Hesse, Germany, 2021.

Class type or grade	No. students	No. COVID-19 case-patients	COVID-19 attack rate, %
Class
A	88	43	49
B	91	25	28
C	84	2	2,4
D	43	0	0
Grade
1	91	21	23
2	68	19	28
3	81	19	24
4	66	11	17