***** 心急人: 在美國出生的子女 - 在香港打預防針問題 *****

yes, you can enjoy the free service.
but please note that, some vaccine are not available in public system, and u still have to pay for it in private sections, e.g. rotavirus, Hibs, varicella, etc.
also, the vaccine provided by public system are of low-cost which may cause more side-effect e.g. fever.
since you didnt mention how how is ur kid.. the following phone no. may help 28903808

如果bb是香港永久性居民係可以免費去健康院打針ga!! 我個friend 都同你既情況一樣, 你去就近既健康院book就ok ga la!!

如果你確定佢係香港永久居民,你可以去就近的母嬰健康查問一下,應該可以享有這個服務。