A potential Covid-19 vaccine developed by Chinese top military virologist has shown promising results in an early clinical trial, successfully triggering an immune system response in over a hundred healthy adults.
“However, these results should be interpreted cautiously. The challenges in the development of a Covid-19 vaccine are unprecedented, and the ability to trigger these immune responses does not necessarily indicate that the vaccine will protect humans from Covid-19.” In total, 105 of the participants had developed binding antibodies – which attach themselves to the pathogen and can help mark them out to the immune system – 28 days after the vaccination. The study said none had shown any “serious” adverse reaction.
However, there are limitations to the study. One of the major concerns in vaccine trials is pre-existing immunity. This phenomenon is a major concern for scientists developing Covid-19 vaccines as this has been observed with other coronaviruses. A 2007 trial of a possible HIV vaccine had to be halted because of this problem, but remains unclear why this happened.
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