New COVID booster shows promise in 887-person trial
NCT ID NCT05142553
First seen Mar 22, 2026 · Last updated May 23, 2026 · Updated 1 time
Summary
This study tested a new booster vaccine called PHH-1V in 887 adults who had already received two doses of the Pfizer COVID-19 vaccine. The goal was to see if PHH-1V could safely boost immunity as well as or better than another Pfizer dose. The trial also looked at giving a fourth dose of PHH-1V to some participants.
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This is a summary of
the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Hospital Clinic de Barcelona
Barcelona, Barcelona, 17170, Spain
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Hospital Clínico de Valencia
Valencia, Valencia, 46010, Spain
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Hospital Germans Trias I Pujol
Badalona, BARCELONA, 08916, Spain
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Hospital Gregorio Marañón
Madrid, Madrid, 28007, Spain
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Hospital Principe de Asturias
Meco, Madrid, 28805, Spain
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Hospital Regional Universitario de Málaga
Málaga, Málaga, 29010, Spain
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Hospital Universitari Dr. Josep Trueta
Girona, Girona, 17007, Spain
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Hospital Universitario La Paz
Madrid, Madrid, 28046, Spain
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Hospital Vall Hebron
Barcelona, BARCELONA, 08035, Spain
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Hospital de Cruces
Barakaldo, VIZCAYA, 48903, Spain
Conditions
Explore the condition pages connected to this study.