Covid 19 -

[Romulus]

Originally Posted by russellw

The WHO stated a few days ago:

"There is currently no evidence that people who have recovered from Covid-19 and have antibodies are protected from a second infection,"

The current consensus view is that more research is going to be required before a definitive answer is available and that may not even apply to everyone when it is established or may not be 'permanent'.

Most of these viruses do provide a measure of immunity once you've had it but Influenza is an example of one that has both sufficient variations and a relatively short term to the immunity provided by antibodies.

It's one of the reasons why the triple antigen flu shot is provided annually.

One of the reasons a triple antigen flu shot is provided is because the flu shot has one of the lowest efficacy rates of all vaccines. the 'scientists' are basically guessing which flu strain may be prevalent in the upcoming season. Efficacy rates are below 50%.

As per the information from CDC's website https://www.cdc.gov/vaccines/vac-gen/immunity-types.htm

Immunity to a disease is achieved through the presence of antibodies to that disease in a person’s system. Antibodies are proteins produced by the body to neutralize or destroy toxins or disease-carrying organisms. Antibodies are disease-specific. For example, measles antibody will protect a person who is exposed to measles disease, but will have no effect if he or she is exposed to mumps.

There are two types of immunity: active and passive.

Active Immunity

Active immunity results when exposure to a disease organism triggers the immune system to produce antibodies to that disease. Exposure to the disease organism can occur through infection with the actual disease (resulting in natural immunity), or introduction of a killed or weakened form of the disease organism through vaccination (vaccine-induced immunity). Either way, if an immune person comes into contact with that disease in the future, their immune system will recognize it and immediately produce the antibodies needed to fight it.

Active immunity is long-lasting, and sometimes life-long.

Passive Immunity

Passive immunity is provided when a person is given antibodies to a disease rather than producing them through his or her own immune system.

A newborn baby acquires passive immunity from its mother through the placenta. A person can also get passive immunity through antibody-containing blood products such as immune globulin, which may be given when immediate protection from a specific disease is needed. This is the major advantage to passive immunity; protection is immediate, whereas active immunity takes time (usually several weeks) to develop.

However, passive immunity lasts only for a few weeks or months. Only active immunity is long-lasting.


Is the World Health Organisation arguing a position contrary to that of the Centres for Disease Control and Prevention?

[PhilT2]

Originally Posted by Romulus

Is the World Health Organisation arguing a position contrary to that of the Centres for Disease Control and Prevention?

No...