How close are we to having a vaccine for COVID-19? And how are some of the challenges being addressed as the race to develop it continues.Subscribe to us on YouTube:Follow us on:Facebook: Twitter: Instagram: africaCGTN AfricaCoronavirusCOVID-19COVID-19 immune systemCOVID19immune systemIMMUNITYnewsSearchVaccinevideoVITAMINvlogYouTubeRelated Posts Persistent immune activation and MS explosion #diseaseprevention April 13, 2026 Cicada COVID Variant Spreading in U.S. | What Doctors Want You to Know Now April 12, 2026 New COVID Variant Affecting Kids April 7, 2026 What to know about ‘Cicada,’ the new COVID-19 variant #shorts April 6, 2026 New ‘Cicada’ COVID variant detected as experts urge caution April 4, 2026 New COVID variant spreading April 2, 2026