Table 4.

Transitions of disease severity during reinfection.

Disease severity index infection	Disease severity reinfection	n	%
Asymptomatic	Asymptomatic	805	1.15
Asymptomatic	Mild	3,834	5.47
Asymptomatic	Severe	35	0.05
Mild	Asymptomatic	3,313	4.73
Mild	Mild	59,829	85.4
Mild	Severe	372	0.531
Severe	Asymptomatic	122	0.174
Severe	Mild	1,634	2.33
Severe	Severe	130	0.186