Betta, Monica and Laurino, Marco and Pugliese, Andrea and Guzzetta, Giorgio and Landi, Alberto and Manfredi, Piero Optimal Varicella immunization programs for both Varicella and Herpes Zoster Control. In: Erice MathCompEpi 2015, August 30 - September 5, 2015, Erice, Italy (2015)