Is taking a vaccination to prevent serious diseases contrary to Islamic faith?

Seeking medical treatment through permissible means is commendable and does not contradict reliance on God (Tawakkul (definition)). This differs from seeking treatment through forbidden or disliked means. The forbidden is unlawful, and it is better to avoid the disliked. Medical treatment does not negate reliance on God; rather, abandoning permissible means contradicts the true essence of reliance on God. Reliance on God is the heart's dependence on God while actively pursuing means. Taking permissible medications and vaccinating children does not contradict faith or reliance on God; instead, it is required.