Figure 3

Matrices estimated from contact data and matrix of the transmission rates. (a) Daily average cumulative number \(\left({\overline{c} }_{ij}\right)\) of contacts for an \(i\)-individual in line with group (Gp) \(j\) in column whatever his or her state (susceptible, exposed, infectious/contagious or removed); (b) Average duration \(\left({T}_{ij}^{\#}\right)\) per "contagious" contact during the 10-day study period, i.e. between an \(i\)-susceptible (S-) individual and an \(j\)-infectious/contagious (I-) individual, expressed in second; (c) Transmission probability \(\left({P}_{ij}\right)\) matrix in case of "contagious" contact between two individuals (must be multiplied by 10^–3) and (d) Average transmission rate per day for an \(i\)-susceptible (S-) individual in case of contact with any \(j\)-infectious (I-) individual over the 84 scenarios with a relative error less than 5% on the incidence cases number. Example of interpretation: (a) *A hospitalized patient had on average 22.17 contacts with nurses per day, (b) *A susceptible patient and a contagious nurse had contacts of 45 s on average, (c) *A susceptible patient had 1.17 × 10^–3 chances of becoming infected in case of contact with a contagious nurse, (d) *A susceptible patient may be infected by any contagious nurse at a 1.04 rate i.e. every 23 h of "contagious" contact.