Booster before or after? study seeks best COVID protection for Immune-Weak patients

NCT ID NCT05415267

First seen Feb 28, 2026 · Last updated May 03, 2026 · Updated 3 times

Summary

This study looks at 320 adults who need strong immune-suppressing drugs and have already had at least two COVID-19 vaccines. Researchers want to know if giving a booster right before starting treatment or waiting six months provides better protection. The goal is to find the safest and most effective timing to keep these vulnerable people from getting very sick from COVID-19.

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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

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Blacktown Hospital

    RECRUITING

    Blacktown, New South Wales, 2148, Australia

    Contact Email: •••••@•••••

  • Concord General Repatriation Hospital

    RECRUITING

    Concord, New South Wales, 2137, Australia

    Contact Email: •••••@•••••

  • Royal Prince Alfred Hospital

    RECRUITING

    Camperdown, New South Wales, 2050, Australia

    Contact Email: •••••@•••••

  • St Vincent's Hospital, Sydney

    RECRUITING

    Darlinghurst, New South Wales, 2010, Australia

    Contact Email: •••••@•••••

  • Westmead Hospital

    RECRUITING

    Westmead, New South Wales, 2145, Australia

    Contact Email: •••••@•••••

Conditions

Explore the condition pages connected to this study.