Dr. Scott Gottlieb pointed on Friday to the highly transmissible Covid-19 variants as a prospective cause behind a boost in adolescents being hospitalized with the virus in March and April. “Its worrying, the trends on hospitalizations” among teenagers, said Gottlieb, the previous Food and Drug Administration chief during the Trump administration. “I believe its a reflection of the brand-new, more contagious variants.””We are seeing that these variants are more infectious throughout any age groups, so theyre affecting adults more, however theyre also affecting kids more, so youre seeing more kids contract symptomatic Covid and more kids get hospitalized, as an effect of that, especially B. 117,” Gottlieb informed CNBCs “The News with Shepard Smith.” The B. 117 version is presently the most common pressure in the U.S., with 20,915 reported cases, according to the Centers for Disease Control and Prevention.In the first 3 months of the year, CDC scientists discovered that nearly one-third of teenagers hospitalized with Covid needed admission into an extensive care system. Meanwhile, 5% required invasive mechanical ventilation. To be sure, CDC information shows no teenagers in the U.S. died of Covid in the first quarter of 2021. CDC director Rochelle Walensky on Friday urged moms and dads to immunize their teenagers versus Covid, mentioning more teenagers being hospitalized with Covid. Disclosure: Scott Gottlieb is a CNBC contributor and belongs to the boards of Pfizer, hereditary screening start-up Tempus, health-care tech business Aetion Inc. and biotech business Illumina.