CAPS: THE PATHOGEN AND CLINICAL SYNDROME
Prepared by Amesh Adalja and Lane Warmbrod
The FICTIONAL Coronavirus Acute Pulmonary Syndrome (CAPS) is an acute respiratory
infection that can progress to pneumonia and acute respiratory distress syndrome. It is
caused by a swine-origin coronavirus (CAPS virus).
The CAPS virus is from the same family of viruses as SARS and MERS but is antigenically
distinct. The virus has existed in the fruit bat population for many years and has been
transmitted to domestic pigs. The virus causes mild disease in pigs.
Like SARS and MERS, a mutation in the CAPS virus enabled human infection, leading to one
or more spillover events to pig farmers in South America, but with limited human-tohuman spread. Like SARS, a further mutation in the CAPS virus later enabled efficient
human-to-human transmission.
The CAPS virus is more transmissible in mild cases than SARS-CoV, and spread by mildly
symptomatic individuals is possible. Transmission is via the respiratory route, mostly by
respiratory droplets, with some proportion being airborne during aerosol-generating
medical procedures.
• Approximately 50% of CAPS cases require hospitalization, many of them in an
intensive care unit (ICU).
• The CAPS fatality rate in hospitalized patients is about 14%.
• The overall case fatality rate (CFR) is 7%.
• The average R0 is 1.74.
• The incubation period ranges from 5 to 7 days.
There is no licensed vaccine for any coronavirus, although some are in development for
SARS and MERS. There is no antiviral drug with an indication for coronavirus treatment,
although there are several drugs, including anti-HIV drugs, that might be effective. In this
scenario, there is one FICTIONAL HIV antiviral—extranavir—that may be effective for
treatment or prophylaxis of CAPS.
Source:
http://www.centerforhealthsecurity.org/event201/
CAPS - Create A Perfect Storm
Multiple meanings.