2)- Rabia Basray, Amber Malik, Wajiha Waqar, Ambreen Chaudhry, Muhammad Wasif Malik, Mumtaz Ali Khan, Jamil A Ansari, Aamir Ikram. Impact of environmental factors on COVID-19 cases and mortalities in major cities of Pakistan.Journal of biosafety and biosecurity. 2021, 3 (1): 10-16
3)- Caixin Yang, Sihui Zhang, Shan Lu, Jing Yang, Yanpeng Cheng, Yue Liu, Lijun Zhao, Jian Gong, Jianguo Xu. All five COVID-19 outbreaks during epidemic period of 2020/2021 in China were instigated by asymptomatic or pre-symptomatic individuals.Journal of biosafety and biosecurity. 2021, 3 (1): 35-40