这个是最新官方说法。摘录如下: f8 ~. @8 n8 J9 _; K0 a8 o2 |" J4 i4 B( z$ ~: J
Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: : Y" J$ _" |& K + t/ }+ G- T& x% ?- 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; L+ W/ H: F9 z! d: J2 g* \$ J2 i* q' {5 ^) b
- 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. ) I1 K% Q& U5 H; n
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- 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.
* x& i, z' A) F+ {The Public Health Agency of Canada (Nov 12, 2009) recommends: & P6 B7 Q4 ?8 N% t $ p$ c0 b- H$ I+ H4 e) n: K * 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. & x/ T8 z" s% h * Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine.# f! V$ `% r& Y9 L" H8 m
* 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. * Z9 `/ y0 `: X% t" z * All children aged 10 years and older should receive one full dose adjuvanted vaccine.