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There has never been any shortage of oxygen in the country in last 10 months; no paucity at present.
If antibodies reduce in any person in five months, then there is a possibility of reinfection. That is why it is important to wear mask and take precautions even if one was infected earlier.
WHO solidarity trial is a 30-country trial in which India has been a participant and interim results of this have been put on website, which has not yet been peer-reviewed. However, we find that these drugs are not performing as good as it was expected.