Hantavirus and COVID-19 are two distinct viruses that have sparked concern in recent years. While the hantavirus outbreak on a cruise ship has raised questions about its similarities to the global pandemic caused by COVID-19, infectious disease experts and public health officials emphasize the key differences that make the risk to the public extremely low. Here's a closer look at why hantavirus is not like COVID, according to these specialists.
A Wet Log vs. a Wildfire
Dr. Céline Gounder, an infectious disease specialist, draws an intriguing analogy between the two viruses. She compares COVID-19 to a wildfire, requiring dry conditions, no rain, and strong winds to spread rapidly. In contrast, hantavirus is likened to a wet log in a stone fireplace, which smolders and eventually dies out. This analogy highlights the fact that hantavirus is not as easily transmissible as COVID-19.
Gounder explains that hantavirus infects the deep lungs, making it much harder for infected individuals to cough or breathe out enough virus into the air for easy transmission. This is a crucial difference, as it means that hantavirus is not infectious in the same way as COVID-19.
Prolonged Contact Required
Another significant distinction is the mode of transmission. Unlike COVID-19, which can spread through the air, hantavirus requires prolonged physical contact with an infected individual to spread from person to person. Maria Van Kerkhove, the World Health Organization's director of epidemic and pandemic preparedness and prevention, emphasizes this point, stating that hantavirus is not SARS-CoV-2 and does not start a COVID pandemic. It is an outbreak confined to a ship, requiring close contact with a symptomatic person.
The U.S. Centers for Disease Control and Prevention (CDC) supports this view, stating that transmission is usually limited to people who have close contact with a symptomatic individual. This includes prolonged direct physical contact, prolonged time spent in close or enclosed spaces, and exposure to the infected person's bodily fluids.
Longer Incubation Period
The incubation period for hantavirus, typically ranging from two to six weeks, is much longer than that of COVID-19. This extended incubation period provides health officials with more time to respond to the outbreak. Dr. Gounder notes that this longer incubation period is advantageous, allowing for better containment and response strategies.
As passengers repatriated from the cruise ship reach the peak of the virus' incubation cycle, health officials can take proactive measures to monitor and manage potential cases. This longer incubation period also means that people exposed to hantavirus are less likely to spread it quickly, reducing the risk of a widespread pandemic.
Low Risk to the Public
Infectious disease experts and public health officials consistently emphasize that the risk of hantavirus to the general public remains extremely low. Former FDA Commissioner Scott Gottlieb and Admiral Brian Christine, assistant secretary for health at the Department of Health and Human Services, both stress that hantavirus spreads far less efficiently than COVID-19 and requires prolonged close contact with a symptomatic individual.
The CDC's webpage on hantavirus confirms this, stating that the risk of a pandemic caused by this outbreak is extremely low. It also highlights that transmission is usually limited to close contacts with symptomatic individuals, further reinforcing the low risk to the broader public.
In conclusion, while the hantavirus outbreak on a cruise ship may have raised concerns, infectious disease experts and public health officials assure us that it is not like COVID-19. The key differences in transmission, incubation period, and the nature of the virus itself make the risk to the public very low. As always, staying informed and following public health guidelines is essential in managing and preventing the spread of infectious diseases.
