Effective vaccines against toxoplasmosis do not exist due to complex parasite biology
Effective human vaccines against toxoplasmosis currently do not exist, hampered by the parasite's complex intracellular biology, immune evasion mechanisms, and strain diversity.
The retrieved literature consistently confirms that despite decades of research and promising preclinical candidates, no licensed human vaccine exists for toxoplasmosis due to the complex biology and immune evasion strategies of Toxoplasma gondii. No papers contradict this premise.
Erazo Flores BJ, Knoll LJ. <i>Toxoplasma gondii</i> at the Host Interface: Immune Modulation and Translational Strategies for Infection Control.. 2025. https://doi.org/10.3390/vaccines13080819
Highlights that Toxoplasma gondii's immune evasion tactics and intracellular survival pose significant challenges for treatment and vaccine development.
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Qadeer A, Tharwat M, Khan MZ, Juhasz A, Alshanbari FA. Advances and Translational Challenges in <i>Toxoplasma gondii</i> Vaccine Development: From Antigen Discovery to mRNA and One Health Strategies.. 2026. https://doi.org/10.3390/vetsci13050437
Notes that despite decades of intensive research, no effective human vaccine exists due to obstacles including the parasite's complex life cycle, strain diversity, and difficulty achieving sterile immunity.
Batista-Zauli MF, Brasil MECG, de Almeida-Júnior CR, de Abreu BGS, Dos Santos NSA, Ricci MF, Teixeira SMR. Next-Generation Vaccines Against Neglected Diseases: New Promises from Genetically Modified Live-Attenuated Parasites and RNA Vaccines.. 2026. https://doi.org/10.3390/microorganisms14051112
States that individuals affected by or at risk of toxoplasmosis still experience a lack of effective treatments and vaccines.
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