لقاح زيكا

لا يوجد لقاح معتمد حالياً. اللقاحات المرشحة في مراحل التجارب السريرية.

Investigational — specific contraindications will depend on the platform approved. General expectations: mRNA and inactivated candidates expected to have fewer contraindications. Any future live attenuated candidates would be contraindicated in pregnancy and immunocompromised. All candidates: severe allergy to components.

Investigational. Phase 1/2 data: VRC-ZKADNA090: injection site pain (~50%), fatigue, headache, myalgia — generally mild and self-limiting. mRNA-1893: injection site pain (56–78%), fatigue (30–40%), headache (25–35%), myalgia (20%). ZPIV: injection site pain (35%), fatigue, headache. No serious adverse events attributed to any candidate in published trials.

VRC-ZKADNA090 (DNA): 89% seroconversion, neutralizing titers ~1:100 (PRNT50). mRNA-1893: 94% seroconversion after 2 doses, higher GMT than DNA candidate. ZPIV: 92% seroconversion but requires alum adjuvant. No efficacy trials against clinical disease completed (low incidence post-2016 prevents traditional phase 3 trials — adaptive designs under consideration).

Investigational. Co-administration studies planned but limited data. Theoretical considerations: mRNA/inactivated platforms expected to be co-administrable with routine vaccines. Live attenuated: standard 28-day spacing with other live vaccines.

Key target population: women of childbearing age due to congenital Zika syndrome. mRNA and inactivated candidates expected to be safe in pregnancy (but no data yet). Live attenuated candidates: expected contraindication in pregnancy. Pre-conception vaccination strategy likely to be recommended.

No licensed vaccine available as of 2026. Prevention relies on mosquito avoidance (DEET, permethrin-treated clothing, bed nets), sexual transmission prevention (condoms for 3 months after travel for both sexes — CDC; conception timing: wait 3 months for men, 2 months for women after symptom onset/travel), and travel avoidance for pregnant women. WHO maintains Zika virus in R&D Blueprint priority list. Clinical development slowed post-2016 epidemic due to declining incidence making efficacy trials challenging.