Health officials and medical professionals have reaffirmed the safety and efficacy of the measles vaccine amid a rise in cases across the United States, with over 700 cases reported nationwide, including more than 500 in Texas. Despite controversy sparked by Health and Human Services Secretary Robert F. Kennedy Jr.'s claims about the vaccine's safety testing and duration of protection, he acknowledges that vaccination is the most effective method to prevent measles transmission. As measles is highly contagious and can lead to severe health complications, federal health agencies continue to advocate for widespread vaccination to protect public health.