这个是最新官方说法。摘录如下: / R& I& n+ L8 w- y: T " z; X' J5 U7 M) n H4 GNot all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: o% I! f$ ] i' B: V8 w# [/ m' X9 N) _/ W6 L& T0 z5 U! u
- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. - ]. t# t- I- s% `. Y% Y9 J y o ~5 G( h
- 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. 3 K0 p M+ p/ T! j1 R' d* w* o8 L0 ^4 t
- 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.
. b% k) C; t: B' |Will children need one or two vaccines? " q5 O6 r0 H! k+ M6 k1 w% C ) d1 B' Y$ P" W6 @/ ~+ ~The Public Health Agency of Canada (Nov 12, 2009) recommends: ) I% A' ?, s' o0 W' [* T( d$ g# ^
* 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 O. c) ~( ?7 h 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. : Q' P/ w7 r) E6 E Y3 Q+ o* E" u * 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.$ Z# y. g" H5 s. I8 \ t( Z
* All children aged 10 years and older should receive one full dose adjuvanted vaccine.