这个是最新官方说法。摘录如下: & v0 D# f6 a1 w. A# H# Z/ G q 5 \& I' R/ N) ^( p9 V/ F% L1 @Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: . x2 m E4 e; \+ V
* E+ F: q% B' @: V/ Q+ Y
- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. ' _& `" s$ L* G$ u3 G* y
$ }# ~ J! e' o" o- 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. 4 M4 l. \5 k8 B. J
/ E6 x# @* x; L c$ 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.
6 Q; H6 e8 b4 b; BWill children need one or two vaccines? # ~2 k0 F% p- N& ^7 g! f/ G0 Z: N% I. K; J# k' B
The Public Health Agency of Canada (Nov 12, 2009) recommends: ( n* Z0 `3 y* I7 W1 C2 {, V% Q) X * \ x+ x6 y) 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.7 j& D( F, m) M2 @, h2 t
* Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine., Y1 Z: G: \' u7 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.3 S3 M1 K" E) V" n
* All children aged 10 years and older should receive one full dose adjuvanted vaccine.