1. ICMR Virus Unit; Beliaghata Kolkata West Bengal India
2. Infectious Diseases & Beliaghata General Hospital; Beliaghata Kolkata West Bengal India
3. Department of Biochemistry; Calcutta National Medical College; Kolkata West Bengal India
4. Department of Microbiology; Nil Ratan Sarkar Medical College and Hospital; Kolkata West Bengal India