The P.1 Covid-19 variant that originated in Brazil and has spread to more than 25 countries is around twice as transmissible as some other strains and is more likely to evade the natural immunity people usually develop from prior infection, according to a new international study.
根據一項新的國際研究，源自巴西、已傳播至逾25個國家的P.1新型冠狀病毒變種的傳染性是其他一些毒株的約兩倍，而且更有可能逃避人們通常因先前感染而產生的自然免疫力。
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