这个是最新官方说法。摘录如下:9 Z) v; J1 t# o% `" ~
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Not all children will get away with only one shot, however. The Public Health Agency's revised guidelines are as follows: 6 Y' _4 {) ?# X
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- Children between six months and under three years old should still receive two half-doses of adjuvanted H1N1 vaccine, at least 21 days apart. * ^2 I5 ?, S! M% {$ O( z
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- 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. 7 M" R) t y6 g1 r' B s. N
8 b% ?" r# _" u! o- 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.
0 A9 }8 I4 T+ M; {" `. o, }Will children need one or two vaccines?# h. }& j" L$ n7 M" r/ Y7 A! h
8 r$ o! ^$ W8 J. K: Y9 IThe Public Health Agency of Canada (Nov 12, 2009) recommends:4 S. `, D; D9 z
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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.& r9 M( }3 x! S% @( {
* Healthy children with no chronic health problems aged three years to under 10 years should receive one half dose of the H1N1 adjuvanted vaccine.+ V3 u+ G u% L' |6 J
* 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. ) F* R- U. L! _7 b4 H% N; K* W' O * All children aged 10 years and older should receive one full dose adjuvanted vaccine.