The ongoing COVID-19 vaccination campaign has so far targeted less than 3 \% of the world population, and  even in countries where the campaign has started  many citizens will not receive their doses for many months.
<fluency> The ongoing COVID-19 vaccination campaign has so far targeted less than 3 \% of the world population, and  even in countries where the campaign has started  many citizens will not receive their doses for many months.
The ongoing COVID-19 vaccination campaign has so far targeted less than 3 \% of the world population, and , even in countries where the campaign has started many citizens will not receive their doses for many months.