Children previously infected with COVID-19 have natural circulating antibodies that last at least seven months, according to a new study led by the University of Texas Health Science Center at Houston.

Children's natural immunity against Covid lasts up to seven months, but vaccines are still important: Study

Brazil variant of COVID-19 that has been labelled P1 is about twice as transmissible as some of the other wireless trains and is said to be more likely to evade the natural immunity system.

Brazilian P1 COVID-19 variant raises concerns

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Children's natural immunity against Covid lasts up to seven months, but vaccines are still important: Study

Brazilian P1 COVID-19 variant raises concerns