Recent Measles Importation Events in South Carolina
During a recent series of importation events, residents of South Carolina visited public spaces while contagious with measles. This led to four individuals who had close interactions with those visitors becoming ill. These four people went to schools, healthcare facilities, and a church while infectious. Ultimately, nine additional contacts and one person exposed in a public setting also fell ill, resulting in a total of 14 cases from January 15 to February 17.
In a subsequent importation incident, two residents returned from South Carolina and became sick between January 15 and 16. However, no further cases were linked to them. A fourth event involved a person who returned from traveling and followed isolation and quarantine guidelines, leading to no additional cases associated with this individual.
In another case, a resident from Washington state returned from out of state, where they had contact with sick individuals, and fell ill on January 19. While contagious, this person also visited a school and a healthcare facility, resulting in six close contacts becoming infected. In total, this cluster included seven cases from January 19 to January 29, and genomic analysis revealed that five of the cases were nearly identical to those found in South Carolina.
Public health officials attribute the effective management of the situation to essential measures such as isolation, quarantine, and contact tracing, which have prevented a wider spread of the virus.
Contradicting Statements from Health Secretary Kennedy
The findings provide insight into the rapid spread of the measles virus across state lines, particularly as vaccination rates decline. However, they stand in contrast to claims made by Health Secretary Robert F. Kennedy Jr., a well-known anti-vaccine figure. He has minimized the seriousness of the current measles outbreak in the U.S. and firmly opposed the notion that his long history of anti-vaccine rhetoric has played a role in the rise of cases and the decrease in vaccination rates.
Kennedy has asserted that there is a “global outbreak” and that the U.S. is “doing a better job than any country in the world at controlling the measles outbreak.” Yet, both of these assertions are incorrect. Numerous countries report lower rates of measles cases than the United States. While some neighbors like Canada and Mexico are also witnessing increases in cases, the surge in the U.S. is primarily due to local spread in communities with low vaccination coverage, rather than international transmission.
According to data from the Centers for Disease Control and Prevention, only 18 out of the 4,588 confirmed measles cases in the U.S. this year have been among international visitors. The overwhelming majority, 4,404 cases—or 96 percent—are linked to domestic outbreaks, with 43 new outbreaks reported throughout the year.
