这个是最新官方说法。摘录如下: 9 {3 o1 t- G/ E) x! S1 k! ?, ? # h$ u. P' g3 F2 hNot all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: * v' h( l; g7 f3 r. y: W& V2 a / ^+ Q, t5 d+ f. w* m+ u3 r- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. y% I& s' a8 s' d * G; X. x6 j$ B6 R0 f- 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. $ [7 `3 D& C. g9 {: t
* W! h) \ \9 @- 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.
o/ \9 E _1 I' t. O9 MWill children need one or two vaccines?" R7 T' Q# y5 k) y9 u- ], s: s0 Z S
}3 I# ~& C) X1 `6 \; PThe Public Health Agency of Canada (Nov 12, 2009) recommends: % e2 F/ L. N1 C) {+ `/ f9 r' F; Q# j, {. U% V% u+ P
* 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. $ V; Q: `7 G/ N# }" q7 o * Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine. 6 {/ t5 j/ z7 ^3 `' B * 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. ! b/ e% q4 {0 |* n4 A: ~ * All children aged 10 years and older should receive one full dose adjuvanted vaccine.