这个是最新官方说法。摘录如下:2 g7 w( M. ?( I2 T$ a
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Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: 7 p1 Z1 @2 A) s$ Y
3 K# X- [3 Z9 @. D( }2 s% T- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. + Q- A9 D8 {' z0 C) e 2 c8 j8 c$ Z1 ^+ Y% T& h2 N- 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. $ p1 N: Z9 E1 w6 ^% m4 C
+ V1 p6 l+ U2 l# @4 s# p+ q0 L- 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 : f( [" x/ ^% P2 x' }, M& hhttp://www.albertahealthservices.ca/901.asp#children p1 r+ O$ V9 j, K# M
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Will children need one or two vaccines? 5 w* S0 \+ a8 r4 i, {% R. Q# J) K 8 @( p8 M4 w+ l; xThe Public Health Agency of Canada (Nov 12, 2009) recommends:8 d% q$ O7 K2 O
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* 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.. ]1 W, X" d$ r/ K8 z
* Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine. + M/ D9 I r2 |9 j: m * 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.: O7 F+ q- P# M; `8 Q5 L3 R
* All children aged 10 years and older should receive one full dose adjuvanted vaccine.