Models and Strategies on Reopening Lockdown Societies due to COVID-19

COVID-19 has caused community lockdown, factory pausing, and economic activity decreasing. We study a compartmental Susceptible-Infected-Quarantine-Susceptible (SIQS) model, which is derived from the Susceptible-Infected-Susceptible (SIS) model with an infected subject isolation compartment, and get three results through analysis the partial data related to COVID-19. First, we present scientific principles of controlling the spread of COVID-19 via isolation infected subjects. Second, we find that without the lockdown, it is possible to control COVID-19 through isolation more than 15.3\% of unquarantined infected subjects every day. The lockdown communities could be reopened. Third, we propose the strategies to test, isolate the infected subjects under different situations. Some of these strategies could be used to cope with other new pandemic diseases for the human being.

Palatal Actinomycosis and Kaposi Sarcoma in an HIV-Infected Subject with DisseminatedMycobacterium avium-intracellulareInfection

ActinomycesandMycobacterium avium-intracellulareare facultative intracellular organisms, members of the bacterial order actinomycetales. AlthoughActinomycescan behave as copathogen when anatomic barriers are compromised, its coinfection withMycobacterium avium-intracellularehas not previously been reported. We present the first reported case of palatal actinomycosis co-infection with disseminated MAC, in an HIV-infected subject with Kaposi sarcoma and diabetes. We discuss the pathogenesis of the complex condition of this subject.