Do Those Who Have Taken The Booster Need A Fourth Dose?

Dismal precaution dose uptake at 27 percent has prompted the Govt to urge people to vaccinate. However, Those who have taken the third dose are worried that a fourth is needed. The obvious question is whether those who have taken the third dose need a fourth? The Govt has not said yes to this - Experts say there is no data to show existing vaccines are effective as the fourth dose especially a vis omicron and its sub-lineages that still cause infection after complete vaccination.