这个是最新官方说法。摘录如下: ! r# \9 D' E- n- `1 |, h: q 0 M/ I% o9 o* T: p2 O! S( p; \Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: 4 P+ Y; G! A" B. S/ z$ J
# x- L0 M: q$ @. F2 j/ w- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. 0 Q) h9 O' y; h$ K$ g) f + C+ z& X% ^! M1 j* ] 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. . h4 Z: H# v; f- N- B
6 b# `7 f. P/ [) C5 U# 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 & e) q( j2 n" ^' b6 Q- W+ D http://www.albertahealthservices.ca/901.asp#children , y( G' m1 J' j! s% w5 k j, b) L9 @! k; @/ q7 oWill children need one or two vaccines? ; m" ]/ G3 D* D% E- N. g8 ^, w" y7 c; l3 h4 Z7 V% R+ q
The Public Health Agency of Canada (Nov 12, 2009) recommends:4 @% `1 O$ U m' L5 v
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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.! v- b$ s6 \8 A: W) 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. 1 a7 Z& z8 r8 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.' ~/ e, v: { w4 z& J
* All children aged 10 years and older should receive one full dose adjuvanted vaccine.