Effectiveness of seasonal influenza vaccination in healthcare workers: a systematic review
2011 ◽
Vol 79
(4)
◽
pp. 279-286
◽
2013 ◽
Vol 9
(2)
◽
pp. 349-361
◽
2010 ◽
Vol 182
(12)
◽
pp. E542-E548
◽