Table 1.

Estimates of infection probability and secondary attack rates.

Household RSV transmission studies	Reference SARs in the pediatric group (n/N)	$p_v$ (estimated based on the SAR for pediatric individuals)	SAR (%) in the adult group		SAR (%) in the elderly group
			Prediction: median [95% PI interval]	Reference: [95% CI interval]^	Prediction: median [95% PI interval]	Reference: [95% CI interval]
Cohen et al. [18]	31/225	0.83 [0.55 1.64] (× 10−2)	Not estimated	6.7 [4.0, 10.9]	Not estimated	0
Munywoki et al. [19]	51/114	3.27 [2.16, 6.41] (× 10−2)	24.2 [8.28, 41.4]	16.7 [10.8, 24.8]	2.53 [0, 8.44]	NA
Hall et al. [20]	7/26	1.3 [0.9, 2.5] (× 10−2)	13.6 [2.83, 28.8]	33 [16.3, 56.2]	1.56 [0, 4.56]	NA

The secondary attack rate pediatric individuals (1–4 years old) were used to compute the infection probability for each study. The parameter $\xi$ was calibrated only based on the median estimates of $p_v$ and the SAR in the adult group from [18] (median = 4.57 with a 95% PI [2.03, 23.36]). Using the median estimates of $\xi$, the SARs for the adult group (15–49 years old) in [19] and in (17–45 years old) [20] were computed. The SARs for the elderly group (>65 years old) were not available.

^{^}The 95% confidence interval (CI) was estimated using EPITOOLS.