Kate O’Brien, head of immunization at the World Health Organization (WHO), named the weaknesses of coronavirus vaccines. Her interview is available on the organization’s Twitter feed.
O’Brien warned that precautions need to be taken even after vaccination because it is not yet known to the global community whether vaccination can protect a person from infection and transmission. At this time, only the drugs have been proven to protect against the disease. This is a “very important” aspect of understanding vaccine efficacy, she said.
Another weakness of vaccines is that there is no evidence on how to administer vaccines to certain age groups, particularly children. These categories of citizens would remain at risk of infection and transmission to others, the WHO representative said.
In addition, there is not enough vaccine worldwide to protect all residents against the coronavirus, so masks should continue to be worn, distance should be kept and hands should be washed. Many countries still face widespread spread of the coronavirus, and the duration of precautionary measures depends on what countries can do to defeat the infection, O’Brien concluded.
Earlier, the WHO said it has no evidence that vaccination reduces the risk of transmission of the coronavirus. “Since there is no evidence yet of a vaccine’s effect on transmission, non-pharmaceutical measures [to contain the virus], including wearing masks, physical distancing, hand washing and so on, should continue to be adhered to,” the organization explained.