Figures show effectiveness of vaccines 'indisputable'

People who have been vaccinated make up just a quarter of those who have contracted COVID-19 in the fourth wave of the pandemic, from a population in which clos

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Malta ,Tanya Melillo , ,Infectious Disease Prevention ,மால்டா ,தான்யா மெலிலோ ,தொற்று நோய் ப்ரெவெந்ஶந் ,