But such speculation needs to be tested  we cant just rely on an educated guess. The Indian researchers agreed that further studies using high antibody levels may find it to be more effective. Such purified antibodies are already used to treat patients with antibody deficiencies. Get CNN Health's weekly newsletter Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team. Prof Paul Morgan, the director of the Systems Immunity Research Institute at Cardiff University and a member of the British Society for Immunologys expert taskforce on immunology and Covid-19, said there were other reasons for optimism.
CNN Health's newsletter comes out every Wednesday.
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