Table 1.

Consulted official public health websites.

Country	Websites
All countries (ECDC)	https://vaccine-schedule.ecdc.europa.eu/
All countries (WHO)	http://apps.who.int/immunization_monitoring/globalsummary/schedules
Serbia	https://www.paragraf.rs/propisi/pravilnik_o_imunizaciji_i_nacinu_zastite_lekovima.html http://www.batut.org.rs/download/publikacije/SMU%20imuinizacija.pdf
Bosnia and Herzegovina	http://mz.ks.gov.ba/sites/mz.ks.gov.ba/files/naredba_za_2019-_broj026.pdf https://vakcine.ba/kalendari-imunizacije-2/kalendar-imunizacije-rs-2019/ https://www.zzjzfbih.ba/imunizacija/
North Macedonia	http://zdravstvo.gov.mk/wp-content/uploads/2019/08/Programa-za-zadolzhitelna-imunizatsija-na-naselenieto-vo-RM-za-2019-godina.pdf
Montenegro	http://www.mzdravlja.gov.me/biblioteka/dokument http://www.dzpg.me/kalendar-obaveznih-imunizacija/
Poland	https://gis.gov.pl/wp-content/uploads/2018/01/akt.pdf
Czech Republic	https://www.vakcinace.eu/data/files/downloads/ockovaci_kalendar_dospsdatem.pdf http://www.szu.cz/tema/vakciny/ockovaci-kalendar-v-cr
United Kingdom	https://www.gov.uk/government/publications/menacwy-programme-information-for-healthcare-professionals
France	https://vaccination-info-service.fr/var/vis/storage/original/application/download/calendrier-vaccinal-2019.pdf https://vaccination-info-service.fr/La-vaccination-au-cours-de-la-vie/Adultes-20-a-64-ans
Belarus	http://minzdrav.gov.by/ru/dlya-belorusskikh-grazhdan/vaktsinatsiya/natsionalnyy-kalendar-privivok.php
Russia	https://www.rosminzdrav.ru/poleznye-resursy/klinicheskie-rekomendatsii-po-vaktsinoprofilaktike-pnevmokokkovoy-infektsii https://www.rospotrebnadzor.ru/deyatelnost/epidemiological-surveillance/?ELEMENT_ID=5575
Ukraine	https://moz.gov.ua/dokumenti
Moldova	https://msmps.gov.md/en
Belgium	https://www.laatjevaccineren.be/vaccinaties-voor-volwassenen-19-64-jaar https://www.vaccination-info.be/adultes/
Switzerland	https://www.infovac.ch/docs/public/fs/plan-de-vaccination-2019.pdf
Italy	http://www.salute.gov.it/imgs/C_17_pagineAree_4829_listaFile_itemName_0_file.pdf
Greece	http://www.isth.gr/images/uploads/files/emvoliasmos2018-2019.pdf

ECDC: European Centre for Disease Prevention and Control; WHO: World Health Organization.