Research Article

Referral Activity in Three Store-and-Forward Networks during the COVID-19 Coronavirus Pandemic

Figure 1

(a) Types of query for the cases on network A for the first six months of 2018, 2019, and 2020. (b) Types of queries for the cases on network B for the first six months of 2018, 2019, and 2020.
(a)
(b)