RSA Conference 2020 is one of the biggest security conferences of the year, but it will have to go on without some major backers due to the coronavirus.

According to organizers, Verizon, IBM and AT&T Cybersecurity have pulled out of the conference amid concerns over the virus. In total, that brings the count to 14 companies who have withdrawn, including six from China, seven from the U.S. and one from Canada.

San Francisco Mayor London Breed has tried to reassure attendees, emphasizing that the “risk of becoming infected with COVID-19 in San Francisco is low, as the virus is not circulating within our community.”

Overall, only an estimated 1.2 percent of expected attendees have canceled. In the meantime, organizers provided the following recommendations for those attending:

“In addition to following CDC recommendations like frequent hand washing, RSA Conference reminds attendees that other preventive measures have been put in place to help reduce the risk of infection. The Moscone Center is following recommendations in the US EPA’s Emerging Pathogen Policy regarding the use of cleaning disinfectants effective against the coronavirus and CDC health screenings for qualified travelers arriving from international destinations at the San Francisco International Airport.“