A comparison of clinical outcomes between vaccinated and vaccine-naive patients of COVID-19, in four tertiary care hospitals of Kerala, South India oleh Sabarish Balachandran, Merlin Moni, Dipu T. Sathyapalan, Prinoj Varghese, Manoj P. Jose, Mithun R. Murugan, C. Rajan, Dhanraj Saboo, Sooraj S. Nair, Reshmi Ann Varkey, Parvathy Balachandran, Geetha R. Menon, Beena K. Vasudevan, Amitava Banerjee, Chandrasekhar Janakiram, Jaideep C. Menon