The Wuhan Institute of Virology (WIV) maintains a number of databases of samples and viral sequences.
DRASTIC (Decentralized Radical Autonomous Search Team Investigating COVID-19) area team of sem-anonymous, (self-described) "Twitter detectives" who research and write papers about the origin of SARS-CoV-2.
In February 2021, Billy Bostickson and Gilles Demaneuf from DRASTIC published An investigation into the WIV databases that were taken offline, claiming that the batvirus database (which included bat and rodent virus samples) was made inaccessible to external access on 12th Sept 2019
In Dec 2020, Pr. Shi Zhengli explained in a BBC interview that access to the DB was stopped to prevent cyber security attacks.
On the 26th January 2021, Pr.Shi Zhengli confirmed again that the database has been taken offline ‘during Covid-19 pandemic’ in an email answer to Tommy Cleary.
On the 10th March 2021, during a Chatham House interview, Peter Daszak repeated the exact reason given by Shi Zhengli in her email to Tommy Cleary above.
These three statements do not make any sense since the main database was taken offline on the 12 Sep 2019, 3 months at least before the official start of the pandemic. So either the reason given for taking the database off is not correct (which raises more questions), or the statement points at an outbreak in Sep 2019.
Did the "batvirus" dabatase of the WIV get taken permanently off-line on September 12th 2019? Did Shi Zhengli from the WIV claim that it went down during the pandemic because of cyberattacks?