Re-epithelialization reduces transmission risk
“A clean, moist environment can mitigate transmission potential by covering infectious sores and promoting the re-epithelialization of the damaged exanthem,” Dr. Català advised. Tecovirimat (TPOXX, ST-246), an antiviral drug for smallpox, is approved for treating monkeypox in Europe but not in the United States (but it is approved for smallpox in the United States). Another antiviral drug, brincidofovir (CMX001 or Tembexa), is approved for smallpox in the United States, but not in Europe, according to Dr. Català. (In the United States, no treatment is specifically approved for treating monkeypox, but antivirals developed for smallpox “may prove beneficial against monkeypox,” according to the CDC.)
But she advised weighing the risks and benefits of using either drug in any individual patient.
The data suggest that the risk of viral shedding persists until the late stages of the disease trajectory. “A person is considered infectious from the onset of clinical manifestations until all skin lesions have scabbed over and re-epithelization has occurred,” Dr. Català said.
The prolonged period of contagion might be one reason to expect monkeypox to be transmitted more generally than it is now, according to Boghuma K. Titanji, MD, PhD, assistant professor of infectious diseases, Emory University, Atlanta.
“The longer the outbreak persists, the more likely we will see cases reported in groups other than MSM who have been most affected so far,” said Dr. Titanji, the first author of a recently published review article on monkeypox in Open Forum Infectious Diseases.
However, he acknowledged that a COVID-like spread is not expected. “The spread of monkeypox requires close and prolonged contact and is generally inefficient via fomites and droplet modes of transmission,” Dr. Titanji said in an interview. “Spread in heterosexual networks and congregate settings like crowded jails where close contact is unavoidable remains a concern that we need to educate the public about and maintain a high level of vigilance for.”
Dr. Català and Dr. Titanji report no potential conflicts of interest.