Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials - The Lancet
Second generation COVID-19 vaccine trials begin with Moderna booster shots - ABC7 San Francisco
Moderna Begins Clinical Trials of Omicron-Specific Booster
Omicron BA.1-containing mRNA-1273 boosters compared with the original COVID-19 vaccine in the UK: a randomised, observer-blind, active-controlled trial - The Lancet Infectious Diseases
UK launches booster dose trial of seven Covid-19 vaccines
US criticised for rolling out Covid boosters without human trials
Additional dose of Covid-19 vaccine is safe, says US trial - Drug Discovery World (DDW)
Bharat Biotech to initiate trials of booster dose of Covid-19 vaccine
Safety, immunogenicity and antibody persistence of a bivalent Beta-containing booster vaccine against COVID-19: a phase 2/3 trial | Nature Medicine
Trial confirms safety of mix-and-match COVID-19 vaccine booster | KPWHRI
Moderna starts trial for Omicron-specific booster shot | Reuters
COVID-19 Vaccine Booster Shot Trials Kicked Off by NIH
Booster Ebola vaccine enters first trials at Oxford University | University of Oxford
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Less than 4% of U.S. adults have gotten updated Covid booster shots
South Australian Omicron COVID-19 booster vaccine starting human trials | Newsroom | University of Adelaide
Intravacc launches phase 1 trial for intranasal COVID-19 booster vaccine
Volunteers needed for COVID-19 booster trial | KPWHRI
COVID-19 Booster Vaccination Trials - Various | Fusion Clinical Research
New global vaccine trial launched to evaluate fractional COVID-19 booster shots - Murdoch Children's Research Institute
Volunteers sought for vaccine trial of COVID-19 booster | Newsroom
Bavarian Nordic takes COVID-19 booster shot into Phase 3 trials
Why the recent COVID-19 boosters were authorized before human trials were completed - Poynter
Updated results from COVID-19 vaccine booster trial | KPWHRI
third covid vaccine booster trial | University of Southampton
Pfizer-BioNTech to begin trials of Covid-19 booster vaccine in August