这个是最新官方说法。摘录如下: % I. v) P7 o- Q! A 4 K# c" d2 \6 o% C9 x: NNot all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: # \' y1 m' f1 B: l
0 e, |6 I; e. e. A% D9 o8 g* N- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. & e2 d2 ] M/ }0 J
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- 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. 9 Z3 z; K2 }! E5 \6 C" o1 r
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- 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.
, t1 S& J% a: B {. z0 ]% z- XWill children need one or two vaccines? ) C0 V W' ^$ f2 _0 V + y- G2 j- @7 J& a# B% u. \The Public Health Agency of Canada (Nov 12, 2009) recommends: 3 t8 n9 V9 b& E: b! y& s/ h4 {" | 6 J% Z6 }$ L; e- G9 L * 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. + r( p* U) N5 S7 ]9 o$ K * Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine.* D% ^$ b/ J& w1 J7 n
* 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.8 S2 P6 p0 H6 {. W! w7 M
* All children aged 10 years and older should receive one full dose adjuvanted vaccine.