Table 1. Sequence of laboratory specimen collection, tests, and follow-up visits after the diagnosis of the index case.

	Week 1	Week 2	Week 3 (14th day)	Week 4	Week 5
Index case	Nasopharyngeal PCR Quick serology Serum serology	Nasopharyngeal PCR	Nasopharyngeal PCR		Nasopharyngeal PCR (only if 14th day nasopharyngeal PCR was positive) Serum serology
Household child contacts	Nasopharyngeal PCR Quick serology	Nasopharyngeal PCR	Nasopharyngeal PCR	Nasopharyngeal PCR (only if 14th day nasopharyngeal PCR was positive)	Nasopharyngeal PCR (only if previous nasopharyngeal PCR was positive) Quick serology
Household adult contacts	Nasopharyngeal PCR Quick serology Serum serology	Nasopharyngeal PCR	Nasopharyngeal PCR	Nasopharyngeal PCR (only if 14th day nasopharyngeal PCR was positive)	Nasopharyngeal PCR Quick serology Serum serology