这个是最新官方说法。摘录如下: * n0 n' ]) j( [* C" j7 g# o& d7 |6 @4 O8 b
Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: ( V$ Q& e3 |- r! C, C
! M; S' n( G: n% F7 z( w/ [5 R. X- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. * Q4 ~4 A$ e9 N' e
3 a! K1 z$ z: \" n+ C- Children between three years and nine years old with chronic health conditions should get their first half-dose as quickly as possible. They should get a second half-dose at least 21 days later. 6 P: Q3 E- W( ^2 h2 d0 @) u
) d; F4 g2 Z& @2 m0 z ]$ }- Healthy kids between three years and nine years old should only receive a half-dose of H1N1 vaccine. They don't need to come back for a second shot.
alberta health 的说法 6 o" p/ D* Y5 X9 z B http://www.albertahealthservices.ca/901.asp#children 5 }1 f5 _* f5 w; b$ v 9 K# X t F' [" Y& d& u* SWill children need one or two vaccines? 2 P1 f R0 w0 I! B % H# t5 e% d- O2 Y1 \7 n7 xThe Public Health Agency of Canada (Nov 12, 2009) recommends: 7 n1 Y4 [, L3 |) _: W' L7 W 5 i9 ]. b" p6 v2 M; t, s1 k * Children from six months up to and less than three years old receive two half-doses of the H1N1 adjuvanted vaccine. There should be a minimum of 21 days between the two half doses.2 M: a8 X5 E0 j
* Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine. ; w$ ^, u; m) ^: v * Children aged three to under 10 years with chronic medical conditions should receive two half doses of adjuvanted H1N1 vaccine. There should be a minimum of 21 days between the two half doses.$ `) R" a$ x/ z c
* All children aged 10 years and older should receive one full dose adjuvanted vaccine.