The CDC has escalated its warnings regarding the risk of measles for international travelers, urging all Americans to get vaccinated before traveling abroad. The agency warns of ongoing outbreaks and highly contagious strains of the virus, particularly in air travel settings. With cases reportedly linked to international travel, the CDC stresses the importance of vaccination to mitigate risks. Medical professionals are advising caution as summer travel approaches, emphasizing that those who are not fully vaccinated should consider postponing their trips.