这个是最新官方说法。摘录如下: + V) C5 f# ~0 h2 i {- N3 o/ p4 R; [; p7 z$ c7 U
Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: % R. v' w1 K& z+ O
7 W: K- X5 v$ ?; a4 {+ c- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. * V v, N- B4 D8 t5 r7 T. @ . i- P; t% P3 A) t. u$ J4 W* c' N1 e& d- 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. - o* t7 c2 S {7 d* y
: {# b0 t2 K5 e- 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: v! m$ a$ @( @Will children need one or two vaccines?+ N ~) J3 d0 v1 z7 N% `! b
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The Public Health Agency of Canada (Nov 12, 2009) recommends: . o# S3 N) Y, b7 Y6 N $ w2 C( I% |- t* J * 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.; ~4 s* }$ l0 ?% w6 b
* Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine. * s' \, _7 Q+ O0 o: }: W/ f3 q * 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. * h; ]* [6 r; T * All children aged 10 years and older should receive one full dose adjuvanted vaccine.